Best Slotted Shims for 2026 That Make Leveling Easy

If you have ever reached for shims twice in one afternoon, that is usually a sign your setup needs a better fit. You want slotted shims that match the job, whether you are correcting body panels or dialing in alignment.

The best 2026 options vary more than you may expect, and the right material, slot width, and storage case can make a real difference. A few standouts deserve a closer look.

More Details on Our Top Picks

1. 144-Piece Auto Alignment Body Shim Assortment Set

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   Best Overall

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   If you want a versatile body shim kit, this 144-piece MUFFINMAN set stands out. It includes zinc-plated, rust-resistant shims in four sizes: 1/64, 1/32, 1/16, and 1/8 inch. The box contains 48 of the two smallest sizes and 24 each of the larger sizes, so you can fine-tune body panels, camber, caster, and toe on front or rear wheels. You also get a resealable storage box and a thin 0.02-inch construction. With a 4.7-star rating from 391 reviews, it is a solid automotive replacement choice for alignment work.

   • Piece Count:144 pcs
   • Material:Zinc plated metal
   • Thicknesses:1/64 to 1/8
   • Slot Design:Slotted
   • Rust Resistance:Rust resistant
   • Storage Case:Resealable box
   • Additional Feature:4 size assortment
   • Additional Feature:0.02-inch thickness
   • Additional Feature:Angle grinder compatible

2. 152-Piece Auto Alignment Body Shim Assortment Kit

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   Best Value

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   For quick, precise body alignment fixes, this 152-piece kit offers solid value. It includes zinc-plated, painted shims that resist rust and corrosion, so they remain durable through long-term use. The assortment includes 56 pieces of 1/64, 48 pieces of 1/32, 24 pieces of 1/16, and 24 pieces of 1/8, allowing you to fine-tune body parts quickly. Use them for camber, caster, and toe adjustments on front or rear wheels. The transparent storage box and size labels help you grab the right shim quickly.

   • Piece Count:152 pcs
   • Material:Zinc plated metal
   • Thicknesses:1/64 to 1/8
   • Slot Design:Slotted
   • Rust Resistance:Rust resistant
   • Storage Case:Transparent box
   • Additional Feature:Transparent storage box
   • Additional Feature:Quick size labels
   • Additional Feature:Painted exterior finish

3. ISPINNER Auto Alignment Body Shim Assortment Kit

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   Best Compact Set

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   The ISPINNER Auto Alignment Body Shim Assortment Kit is a practical choice when you need a compact set with precise thickness options. It includes 48 zinc-plated carbon steel shims, allowing you to select 1/64, 1/32, 1/16, or 1/8 sizes for fine adjustments. The U-shaped slotted design lets you place each shim between parts or between a part and the frame for clean wheel, suspension, or body alignment. The clear, size-marked case keeps everything organized and easy to access. For best results, use up to three shims per support.

   • Piece Count:48 pcs
   • Material:Zinc plated carbon steel
   • Thicknesses:1/64 to 1/8
   • Slot Design:U-type slotted
   • Rust Resistance:Rust resistant
   • Storage Case:Resealable case
   • Additional Feature:High-hardness carbon steel
   • Additional Feature:U-type slotted design
   • Additional Feature:Machine foot warning

4. 30Pcs Auto Body Fender Alignment Shim 1/16″ & 1/8″ Thick- 3/8″ Slot (30pcs)

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   Best Starter Kit

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   With 30 zinc-plated shims, this kit provides a practical setup for precise body and wheel alignment. It includes 15 shims at 1/16 inch thick and 15 at 1/8 inch thick, making it easy to fine-tune gaps. The 3/8 inch slot helps you fit and adjust parts quickly during body or suspension work. Use them to help dial in camber, caster, and toe on front or rear wheels. The zinc plating helps resist rust and corrosion, and the resealable storage box keeps your shims organized between jobs.

   • Piece Count:30 pcs
   • Material:Zinc plated metal
   • Thicknesses:1/16 and 1/8
   • Slot Design:Slotted
   • Rust Resistance:Rust resistant
   • Storage Case:Resealable box
   • Additional Feature:3/8-inch slot
   • Additional Feature:Equal thickness split
   • Additional Feature:Body fender fitment

5. 304 Stainless Steel Shim Kit with Storage Case

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   Best Premium Kit

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   A premium 304 stainless steel shim kit is ideal for machinists and maintenance teams who need dependable, organized spacing tools. It includes 100 slotted shims in 10 thicknesses, ranging from 0.001 to 0.077 inch, with 10 pieces of each size. The precision-cut, burr-free edges help you insert them smoothly and reduce snagging. Because the stainless steel resists corrosion, you can rely on it in workshops, marine applications, and demanding maintenance environments. Laser-marked sizes speed selection, while the durable storage case keeps the kit neat, portable, and ready for machine leveling, motor alignment, repairs, calibration, and setup.

   • Piece Count:100 pcs
   • Material:304 stainless steel
   • Thicknesses:0.001 to 0.077
   • Slot Design:Slotted
   • Rust Resistance:Corrosion resistant
   • Storage Case:Storage case
   • Additional Feature:Ten thickness options
   • Additional Feature:Precision-cut edges
   • Additional Feature:Laser-marked sizes

6. Precision Brand 130 Piece Stainless Steel Slotted Shim Assortment

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   Professional Grade

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   Precision Brand’s 130-piece stainless steel slotted shim assortment is ideal when you need professional-grade alignment fast. You get 13 thicknesses, from 0.001 to 0.125, with 10 pieces of each, so you can fine-tune motors, pumps, generators, and plant machinery without guesswork. The 2″ x 2″ Size A shims use 300 series stainless steel for rust and corrosion resistance, and the 5/8 slot helps you install them quickly. You will cut labor, avoid hand trimming, and reduce downtime. The durable metal box keeps your kit organized and ready.

   • Piece Count:130 pcs
   • Material:300 series stainless steel
   • Thicknesses:0.001 to 0.125
   • Slot Design:Slotted
   • Rust Resistance:Rust/corrosion resistant
   • Storage Case:Metal box
   • Additional Feature:2-inch by 2-inch
   • Additional Feature:Metal storage box
   • Additional Feature:Eliminates hand cutting

7. 48PCS Metal Shims for Auto Alignment Body

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   Best For Autos

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   When aligning body panels or adjusting suspension fit, OFBAND’s 48-piece metal shim set offers reliable precision. It includes four thicknesses, 1/8, 1/16, 1/32, and 1/64 inch, allowing you to fine-tune door-to-body gaps, wheel camber, and other automotive alignments. The galvanized iron construction provides strength, while the zinc-plated finish helps resist rust and withstand pressure. U-shaped slots fit between parts and the body for accurate spacing. Engraved sizes make selection fast, and the partitioned storage box keeps each shim organized and ready to use.

   • Piece Count:48 pcs
   • Material:Galvanized iron
   • Thicknesses:1/64 to 1/8
   • Slot Design:U-shaped slots
   • Rust Resistance:Rust resistant
   • Storage Case:Partitioned box
   • Additional Feature:Engraved size data
   • Additional Feature:Partitioned storage box
   • Additional Feature:Door-to-body alignment

8. 32 PCS Auto Body Fender Alignment Shims

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   Best Multi-Purpose

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   32 PCS Auto Body Fender Alignment Shims give you a practical kit for body and suspension adjustments. You get 32 slotted alloy steel shims, 16 at 1/16 inch and 16 at 1/8 inch, each with a 3/8 inch slot. Their zinc plated finish helps resist rust and corrosion, so you can rely on them long term. Use them on cars, trucks, SUVs, or motorcycles for camber, caster, toe, and body alignment. They help you tune suspension geometry, improve handling, and reduce tire wear. The resealable box keeps every shim organized and ready.

   • Piece Count:32 pcs
   • Material:Alloy steel
   • Thicknesses:1/16 and 1/8
   • Slot Design:Slotted
   • Rust Resistance:Rust/corrosion resistant
   • Storage Case:Resealable box
   • Additional Feature:Fits motorcycles
   • Additional Feature:Improved vehicle handling
   • Additional Feature:Reduced tire wear

9. Auto Body Fender Alignment Shims 64 PCS

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   Most Versatile

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   This 64 piece shim kit is a versatile choice for body and suspension alignment work. It includes 32 shims at 1/16 inch and 32 at 1/8 inch, each with a 3/8 inch slot for fast fitment. The alloy steel construction and zinc plating help resist rust, making the shims suitable for demanding weather conditions. Use them to fine tune body panels, camber, caster, and toe on cars, trucks, SUVs, and motorcycles. The resealable plastic box keeps everything organized, protected, and ready for use. Proper alignment can improve handling and reduce tire wear.

   • Piece Count:64 pcs
   • Material:Alloy steel
   • Thicknesses:1/16 and 1/8
   • Slot Design:Slotted
   • Rust Resistance:Rust/corrosion resistant
   • Storage Case:Resealable box
   • Additional Feature:All-weather use
   • Additional Feature:3/8-inch slot
   • Additional Feature:Suspensions geometry support

10. 304 Stainless Steel Slotted Shims Kit (100 Pcs)

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    Best for Precision

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    Engineers and maintenance teams get precision with this 100 piece 304 stainless steel slotted shim kit. You get ten thicknesses, from 0.001 to 0.075 inch, with ten shims per size in a 2 x 2 inch format. Laser marked labels help you pick fast and reduce setup errors. The U shape slips cleanly under motors, pumps, and generators, while burr free edges support safe handling. You can rely on corrosion resistance, high compressive strength, and durable performance in industrial or marine jobs. The organizer case keeps each size sorted and easy to carry.

    • Piece Count:100 pcs
    • Material:304 stainless steel
    • Thicknesses:0.001 to 0.075
    • Slot Design:U-shape slotted
    • Rust Resistance:Rust resistant
    • Storage Case:Organizer case
    • Additional Feature:High compressive strength
    • Additional Feature:High-contrast engraving
    • Additional Feature:Multi-compartment organizer

Factors to Consider When Choosing Slotted Shims

When choosing slotted shims, check the material and coating first, since they affect durability and fit. You should also confirm the correct thickness, quantity, and slot size compatibility for your job. Strong corrosion resistance is important unless the shims will face harsh conditions. Good storage and clear labeling can save time and help you quickly find the exact shim you need.

Material And Coating

Material and coating play a big role in how well slotted shims hold up over time, especially in moist, rust-prone, or outdoor environments. When corrosion is a concern, you will usually want zinc-plated steel, galvanized iron, or 300 or 304 stainless steel. Stainless steel is often the safest choice for harsher applications because it resists rust on its own instead of relying only on a coating. For general alignment work, zinc plating or galvanizing can provide carbon steel or iron with a useful protective layer. You should also look for hard, wear-resistant, anti-oxidation materials so the shim keeps its shape through repeated adjustments. A smooth, burr-free finish matters too, because it makes handling easier and helps the shim seat cleanly between parts.

Thickness And Quantity

Thickness and quantity matter just as much as material because they determine how precisely you can dial in an alignment. Choose a thickness range that matches the correction you need, whether that means common sizes such as 1/64, 1/32, 1/16, and 1/8 inch, or precision shims measured in thousandths. Check how many pieces you get at each thickness, since some kits stack thin sizes in bulk while others give you an even mix. If you fine tune often, choose a set with plenty of thin shims for small adjustments. If you need larger changes, thicker shims save time. Larger kits also reduce the need for reuse and stacking. Make sure the total count gives you enough combinations for your jobs.

Slot Size Compatibility

Slot size compatibility can make or break a slotted shim’s fit, so match the slot width to the fastener or stud it must slide around, whether that is a common 3/8-inch or 5/8-inch opening. Verify that the slot clears the mounting point easily, but do not make it so large that the shim can shift off target. Before you buy, check the hardware on your alignment, leveling, or spacing job and confirm the shim will pass over it cleanly. Choose a slotted shim only when you need to install around an existing bolt, pin, or stud. If you do not need that clearance, a solid shim may fit better. When you stack shims, line up each slot carefully so the combined set still clears the hardware and stays positioned.

Corrosion Resistance

When your slotted shims will face moisture, humidity, or salt, corrosion resistance should be a top priority. You’ll get basic protection from zinc-plated or galvanized steel, which works well for general shop tasks and light outdoor exposure. If you are operating in marine, maintenance, or other harsh environments, 304 stainless steel offers stronger resistance and longer service life. Carbon steel with zinc plating can also hold up, but the coating quality matters more than the base metal alone. Choose shims labeled corrosion resistant or rust resistant whenever wet or salty conditions are likely. You should also look for burr-free, precision-cut parts with smooth edges, since they are less likely to damage protective finishes during installation and help the shim keep its defense intact in use, especially over time.

Storage And Labeling

Good storage and clear labeling can make a big difference whenever you are choosing slotted shims, especially in multi-size assortments. You should pick a set that comes in a resealable or compartmented case so each thickness stays protected and easy to find. Separate sections help you sort common sizes like 1/64, 1/32, 1/16, and 1/8 inch without mixing them up. Clear size markings, whether engraved, laser marked, or printed, let you identify the right shim fast and reduce setup mistakes. A transparent box also helps you check inventory at a glance and confirm every piece is there. With organized packaging, you will spend less time hunting for parts and more time leveling accurately, which improves your workflow and keeps clutter under control during every job.