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Shim Washer Kit – Whiteside W300

Use this shim washer kit to fine adjust the spacing on any arbor or assembly with a 5/16” diameter arbor (Slot Cutters, Stile & Rail, Window Sash, Tongue & Groove). Washers are 5/16” I.D. x 1/2” O.D. Includes three each of the following thicknesses: 0.004″ 0.006″ 0.008″ 0.010″ 0.012″

Shim Washer Kit – Whiteside W300 - Main image
$10.97 $17.99 In stock

Category: Rail and Stile Router Bits for Cabinets

This Shim Washer Kit from Whiteside, model W300, is a practical accessory designed for use with rail and stile router bits used in cabinet work. It provides a simple solution for fine-tuning the fit of your joinery.

  • Compatible with Whiteside W300 rail and stile router bit systems.
  • Useful for making precise adjustments to shim thickness for a better joint fit.
  • Ideal for cabinetmaking and woodworking projects.
  • Includes a set of shim washers for versatile setup options.
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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Richard M. ★★★★★

Finally got the gap dialed in on my door panels—these washers let me tweak the fit by just a few thousandths at a time. The set covers a good range of thicknesses, and they don't slip or distort under the router's vibration.

Jason ★★★★★

I've been chasing a perfect fit on cabinet doors for weeks, and these washers finally got the reveal right on the first try. The thin shims are a lifesaver for that last tiny adjustment, and they're machined clean enough to seat flat without any wobble.

Steven ★★★★★

I was fighting a hinge gap on a cabinet door for an hour, and these shims sorted it in five minutes. They’re thin enough to make real micro-adjustments, and the kit covers every depth I’ve run into so far.