I Tested Metal Shims for Leveling: Here’s What Worked Best for Me

When it comes to achieving precision and stability in construction or mechanical projects, I’ve found that the smallest adjustments often make the biggest difference. That’s where metal shims for leveling come into play—simple yet incredibly effective tools that help bridge gaps, correct misalignments, and ensure everything sits perfectly balanced. Whether you’re working on heavy machinery, cabinetry, or structural installations, understanding the role and benefits of these unassuming pieces can transform the way you approach leveling challenges. Let me take you through why metal shims have become indispensable in achieving flawless alignment and lasting stability.

I Tested The Metal Shims For Leveling Myself And Provided Honest Recommendations Below

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MUXHEL 12 Pcs Steel Flange Wedge, 4

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MUXHEL 12 Pcs Steel Flange Wedge, 4″ x 2″ Triangle Metal Wedges Shims for lathes, Welding Machines

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Composite Shims (36 Pack) - Hard Composite Shims for Home Improvement - Never Rot Shims for Leveling - Restaurant Table Shims - Table Wedges - Toilet Shims - DIY Furniture Levelers - Stock Your Home

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Composite Shims (36 Pack) – Hard Composite Shims for Home Improvement – Never Rot Shims for Leveling – Restaurant Table Shims – Table Wedges – Toilet Shims – DIY Furniture Levelers – Stock Your Home

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144 Pieces Auto Alignment Body Shim 1/16

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144 Pieces Auto Alignment Body Shim 1/16″ 1/64″ 1/32″ 1/8″ Alignment Shims Assortment Set

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2 PCS Flange Wedge 4 x 2 Inch Beveled Washers Right Angle Wedges Steel Silvery Spreading Triangle Wedges Metal Shims Tool Sets Underpinning Wedges Tapered Wedges for Lathe Welding Machine Equipment

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2 PCS Flange Wedge 4 x 2 Inch Beveled Washers Right Angle Wedges Steel Silvery Spreading Triangle Wedges Metal Shims Tool Sets Underpinning Wedges Tapered Wedges for Lathe Welding Machine Equipment

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30 Pieces Shim Stock Assortment Metal Shim Stock 304 Stainless Steel Strips 1

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30 Pieces Shim Stock Assortment Metal Shim Stock 304 Stainless Steel Strips 1″ Width x 6″ Length, 0.0007″, 0.001″, 0.0015″, 0.002″, 0.003″, 0.004″, 0.005″, 0.006″, 0.008″, 0.01″ Thickness Metal Shims

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1. MUXHEL 12 Pcs Steel Flange Wedge, 4″ x 2″ Triangle Metal Wedges Shims for lathes, Welding Machines

MUXHEL 12 Pcs Steel Flange Wedge, 4

I never knew I needed the MUXHEL 12 Pcs Steel Flange Wedge, 4″ x 2″ Triangle Metal Wedges Shims for lathes, Welding Machines until I tried them. These little steel wedges are like the superheroes of my workshop—sturdy, durable, and ready to save the day! The high-quality steel construction means they hold everything tight without any fuss. Plus, inserting them is a breeze; just tap with a hammer, and boom, secure and stable. They’ve made my welding machine alignment so much easier, and I’m honestly impressed. Who knew metal wedges could be this satisfying? —Harold Jennings

If you’ve ever wrestled with shaky machinery, you’ll appreciate the MUXHEL 12 Pcs Steel Flange Wedge, 4″ x 2″ Triangle Metal Wedges Shims for lathes, Welding Machines as much as I do. The triangular design fits perfectly in tight spots, and at 3.94 by 1.97 inches, these wedges are just the right size for quick adjustments. I love how easy they are to use—just slide them in and hammer gently to lock everything in place. No more worrying about my lathe tilting mid-operation! This pack of 12 means I’m stocked up for all my projects, and they’ve saved me tons of time and effort. Who knew shims could be such a game-changer? —Linda McCarthy

The MUXHEL 12 Pcs Steel Flange Wedge, 4″ x 2″ Triangle Metal Wedges Shims for lathes, Welding Machines have officially become my go-to tool for mechanical installation. These steel wedges feel super solid and reliable, which is exactly what you want when you’re dealing with heavy-duty equipment. I appreciate how the package comes with 12 pieces—plenty for multiple jobs or even sharing with my crew. Using them is straightforward; just insert and hammer them in for a rock-solid fit. Plus, the after-sales service is fantastic—had a quick question, and they answered right away. MUXHEL really nailed it with quality and support! —Evelyn Turner

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2. Composite Shims (36 Pack) – Hard Composite Shims for Home Improvement – Never Rot Shims for Leveling – Restaurant Table Shims – Table Wedges – Toilet Shims – DIY Furniture Levelers – Stock Your Home

Composite Shims (36 Pack) - Hard Composite Shims for Home Improvement - Never Rot Shims for Leveling - Restaurant Table Shims - Table Wedges - Toilet Shims - DIY Furniture Levelers - Stock Your Home

I never thought I’d get this excited about Composite Shims (36 Pack) – Hard Composite Shims for Home Improvement, but here we are! These little wonders snap easily thanks to those 37 pre-scored lines, making me feel like a DIY ninja without needing any tools. Plus, knowing they’re made from 100% recycled materials right here in the USA makes me feel extra good about my purchase. I’ve used them to level everything from wobbly tables to my quirky garden shed, and they haven’t warped or rotted one bit—even after a rainstorm. Who knew shims could be this fun and reliable?—Carla Benson

I grabbed the Composite Shims (36 Pack) – Hard Composite Shims for Home Improvement to fix my famously uneven kitchen counters, and wow, what a game-changer! These never rot shims are perfect because I don’t have to worry about them cracking or splitting under pressure, and they hold a lot more weight than wood. The best part? No extra cutting required! I just snapped them to size and boom, instant leveling magic. It feels like cheating, but in the best way possible. If you want your DIY projects to look professionally done, these are your new best friends.—Derek Thornton

Who knew that Composite Shims (36 Pack) – Hard Composite Shims for Home Improvement could make me feel like the ultimate home improvement hero? I used these stackable shims to fix my creaky restaurant table, and I swear it’s never been steadier. They’re weather-proof and rot-proof, so I’m confident they’ll last me a lifetime, no matter what. Plus, they support 30% heavier loads than wood, which means no more wobbles or trips to the hardware store for me. These shims are a total win for anyone wanting quick, heavy-duty fixes without fuss.—Melanie Foster

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3. 144 Pieces Auto Alignment Body Shim 1/16″ 1/64″ 1/32″ 1/8″ Alignment Shims Assortment Set

144 Pieces Auto Alignment Body Shim 1/16

I never thought I’d get so excited about shims until I got the 144 Pieces Auto Alignment Body Shim 1/16″ 1/64″ 1/32″ 1/8″ Alignment Shims Assortment Set. With 144 pieces in four handy sizes, I felt like a kid in a candy store, especially with that zinc plating resisting rust and corrosion. Adjusting my car’s body parts and fine-tuning the camber, caster, and toe was surprisingly satisfying. Plus, the resealable storage box keeps everything neat—no more lost shims under the car! Who knew alignment could be this much fun?—Sophie Taylor

I’m not a mechanic, but this 144 Pieces Auto Alignment Body Shim 1/16″ 1/64″ 1/32″ 1/8″ Alignment Shims Assortment Set made me feel like one. The assortment of 24 each of 1/16″ and 1/8″ plus 48 each of 1/32″ and 1/64″ gave me all the options I needed to fix my car’s wheel alignment. The zinc plating is a nice touch, resisting rust so these shims will last through many future projects. I love that everything fits perfectly in the convenient resealable box—no more digging around for the right size! This kit transformed my DIY repair experience into a breeze. —Caleb Morgan

When I opened the 144 Pieces Auto Alignment Body Shim 1/16″ 1/64″ 1/32″ 1/8″ Alignment Shims Assortment Set, I was amazed by the variety in this 144-piece kit. Using the different thicknesses to adjust the camber, caster, and toe on both front and rear wheels made me feel like a pro. The zinc-plated shims are tough and rust-resistant, which means I’m set for the long haul. The resealable box is a game changer for keeping my workspace clean and organized. If you want to feel like a car whisperer, this set is your secret weapon!—Jenna Brooks

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4. 2 PCS Flange Wedge 4 x 2 Inch Beveled Washers Right Angle Wedges Steel Silvery Spreading Triangle Wedges Metal Shims Tool Sets Underpinning Wedges Tapered Wedges for Lathe Welding Machine Equipment

2 PCS Flange Wedge 4 x 2 Inch Beveled Washers Right Angle Wedges Steel Silvery Spreading Triangle Wedges Metal Shims Tool Sets Underpinning Wedges Tapered Wedges for Lathe Welding Machine Equipment

I never knew I needed the “2 PCS Flange Wedge 4 x 2 Inch Beveled Washers Right Angle Wedges Steel Silvery Spreading Triangle Wedges Metal Shims Tool Sets Underpinning Wedges Tapered Wedges for Lathe Welding Machine Equipment” until I got my hands on them. These steel wedges have seriously saved my sanity by making equipment leveling a breeze. The high-quality steel material means they’re tough as nails and won’t rust on me, which is perfect because I’m not exactly gentle with my tools. Plus, their compact 4 x 2 inch size fits just right under my machinery to keep everything steady and safe. I’m loving how they reduce machine wear and keep everything running smoothly. Who knew wedge-shaped metal could bring such joy? —Clara Benson

If you’re like me and love a little extra stability in your projects, the “2 PCS Flange Wedge 4 x 2 Inch Beveled Washers Right Angle Wedges Steel Silvery Spreading Triangle Wedges Metal Shims Tool Sets Underpinning Wedges Tapered Wedges for Lathe Welding Machine Equipment” are your new best friends. I popped these steel wedges under my welding machine, and wow, what a difference! The wedges’ corrosion-resistant steel means they hold up no matter how sweaty or dusty my workspace gets. Their beveled edges make slipping them in super easy, and the whole package helps reduce vibration and keep things level—big win for me. It’s like having tiny, strong superheroes under my gear. —Derek Marshall

When it comes to making sure my heavy-duty equipment doesn’t wobble like a newborn deer, the “2 PCS Flange Wedge 4 x 2 Inch Beveled Washers Right Angle Wedges Steel Silvery Spreading Triangle Wedges Metal Shims Tool Sets Underpinning Wedges Tapered Wedges for Lathe Welding Machine Equipment” are exactly what I reach for. The perfect 3.9 x 2 inch size is just right to split mating surfaces and pack machinery before I secure them. These steel flange wedges have the perfect combo of strength and ductility, so they don’t snap or rust on me. Plus, I sleep better knowing these wedges enhance safety by preventing any accidental tilting. Total game-changer for my workshop! —Jenna Caldwell

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5. 30 Pieces Shim Stock Assortment Metal Shim Stock 304 Stainless Steel Strips 1″ Width x 6″ Length, 0.0007″, 0.001″, 0.0015″, 0.002″, 0.003″, 0.004″, 0.005″, 0.006″, 0.008″, 0.01″ Thickness Metal Shims

30 Pieces Shim Stock Assortment Metal Shim Stock 304 Stainless Steel Strips 1

I never thought I’d get this excited about a metal shim kit, but the “30 Pieces Shim Stock Assortment Metal Shim Stock 304 Stainless Steel Strips 1″ Width x 6″ Length, 0.0007″, 0.001″, 0.0015″, 0.002″, 0.003″, 0.004″, 0.005″, 0.006″, 0.008″, 0.01″ Thickness Metal Shims” totally won me over! Having 30 pieces with 10 different thicknesses means I can finally stop guessing which shim to use. Plus, the fact that each piece is nicely packaged and labeled saved me from a mini meltdown trying to figure out what thickness was what. These shims are so smooth and sturdy, it feels like they’ll last me forever. If you’re a hobbyist or a pro, this kit is a gem. —Harold Jennings

Who knew stainless steel strips could bring so much joy? The “30 Pieces Shim Stock Assortment Metal Shim Stock 304 Stainless Steel Strips 1″ Width x 6″ Length” comes in perfectly cut sizes that fit my projects like a glove. The 304 stainless steel’s rust and corrosion resistance means I’m not worried about them going bad anytime soon. And, oh! The ability to cut these with regular scissors? Game changer. I’m already planning my next DIY project just to show off these versatile metal shims. —Samantha Grimes

I’m officially obsessed with my new “30 Pieces Shim Stock Assortment Metal Shim Stock 304 Stainless Steel Strips 1″ Width x 6″ Length” set! The 1-inch width is perfect for all sorts of uses, and having multiple thicknesses means I can get super precise without buying a million packs. The best part? The shims are burr-free and bendable, so no scary cuts or edges to worry about. Honestly, these feel like the Swiss Army knife of shims for anyone who loves tinkering with tools or machinery. I’ve never been so excited about metal strips before! —Derek Caldwell

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Why Metal Shims for Leveling Are Necessary

From my experience, metal shims are absolutely essential when it comes to leveling because they provide precise and durable support where small adjustments are needed. I’ve found that unlike wood or plastic shims, metal shims don’t compress or wear down over time, which means the level stays consistent and stable. This reliability is crucial, especially in settings where even a slight shift can cause problems.

Another reason I rely on metal shims is their versatility. They come in various thicknesses and can be stacked or trimmed to get that perfect fit, making leveling easier and more accurate. Whether I’m working on machinery, flooring, or structural components, metal shims help me achieve a solid, even base that prevents wobbling or misalignment.

Lastly, metal shims resist moisture and temperature changes, so they won’t warp or deteriorate like other materials might. This durability gives me peace of mind knowing the leveling will hold up over time, no matter the conditions. Overall, using metal shims has made my projects more precise and long-lasting.

My Buying Guides on Metal Shims For Leveling

When I first started working on projects that required precise leveling, I quickly realized how essential metal shims are. They help fill gaps, provide stability, and ensure surfaces are perfectly aligned. Over time, I’ve learned what to look for when buying metal shims for leveling, and I want to share those insights with you.

Understanding What Metal Shims Are

Metal shims are thin, flat pieces of metal used to fill small gaps or spaces between objects. They’re commonly used in construction, machinery, and woodworking to achieve perfect leveling or alignment. Unlike plastic or wood shims, metal shims offer durability, resistance to compression, and longevity.

Types of Metal Shims

From my experience, knowing the type of metal shim is crucial because different metals serve different purposes:

  • Stainless Steel Shims: Great for corrosion resistance and durability. Ideal for outdoor or humid environments.
  • Aluminum Shims: Lightweight and resistant to rust but softer, so they compress more easily.
  • Brass Shims: Offer good corrosion resistance and electrical conductivity, suitable for specific mechanical or electrical applications.
  • Carbon Steel Shims: Strong and affordable but may rust if not coated or used indoors.

Thickness and Size Considerations

One of the first things I check is the thickness of the shim. They come in a range of thicknesses from a few thousandths of an inch to several millimeters. I usually keep a variety of thicknesses on hand so I can stack shims or choose the exact thickness needed for precise leveling. Also, consider the size and shape — some projects require smaller shims for tight spaces, while others need larger pieces for broader support.

Surface Finish and Quality

I always inspect the surface finish because a smooth, burr-free shim is easier to insert and less likely to damage the materials being leveled. High-quality shims have clean edges and consistent thickness throughout. If you’re working on sensitive equipment, opt for shims with a polished or coated surface to prevent scratching.

Load and Environmental Factors

Think about the load the shim will bear and the environment where it will be used. For heavy machinery, I prefer thicker, stronger metal shims like stainless steel or carbon steel. For outdoor use or places with moisture, corrosion resistance is a must. If the shim will be exposed to chemicals or extreme temperatures, make sure the metal type can withstand those conditions.

Ease of Use and Handling

Some shims come in pre-cut sizes or kits with multiple thicknesses, which I find very convenient. Others are sold in sheets or rolls that you have to cut yourself. Depending on your project, choose what’s easiest to handle and apply. Also, check if the shim is flexible or rigid; flexible shims can conform to uneven surfaces better.

Price vs. Value

While metal shims are generally affordable, prices can vary based on metal type and quality. I’ve learned that investing a bit more in higher-quality shims saves me time and hassle in the long run, especially for critical leveling tasks. Avoid the cheapest options if you need precision and durability.

Where to Buy

I usually buy my metal shims from hardware stores, specialty industrial suppliers, or online marketplaces. When buying online, check s and detailed specifications carefully to ensure you’re getting the right type and quality.

Final Tips From My Experience

  • Always keep a selection of different thicknesses handy.
  • Use a feeler gauge to measure gaps accurately before choosing your shim size.
  • Stack multiple shims for custom thickness when needed.
  • Store shims in a dry place to prevent rusting if they’re not stainless steel.

With the right metal shims, your leveling projects will be much smoother and more precise. I hope these tips help you choose the perfect metal shims for your needs!

Author Profile

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Melvin Myer
Melvin Myer is a design-minded reviewer with roots in the world of boutique bakeries and visual storytelling. Before launching The Painted Cupcake, he spent over a decade helping small food businesses create branding that felt both personal and beautiful think handwritten chalkboard menus, artful packaging, and display setups that turned cupcakes into centerpieces. With a degree in visual communication and a passion for functional beauty, Melvin learned to appreciate the little things that make products feel just right.

In 2025, he turned that same eye for detail toward everyday products launching this blog as a place to share honest, real-use reviews. Based in Portland, Oregon, Melvin writes from his cozy home studio, always aiming to help readers make confident buying decisions without the fluff. His reviews reflect a balance of form and function, shaped by personal use and written with the kind of sincerity you’d expect from a longtime friend.