SHIMS do not have a keyway SPACERS do have a keyway Used for fast, accurate spacing of milling cutters, gang cutters, saws, slitting blades and grinding tools Made of high quality steel shim held to tight tolerances Packaged in air tight poly bags 10 pieces per bag (except assortments) Special sizes, material and bulk quantities available on request Below are sizes and thicknesses available I.D. & O.D. sizes below are available with a keyway (spacer) and without a keyway (shim). I.D. x O.D. SIZES KEYWAY SIZES Sizes to the left are available in the following thicknesses: .001, .0015, .002, .003, .004, .005, .006, .007, .008, ,010, .012, .015, .020, .025, .031, .047, .062, .093, & .125 3/8" x 5/8" 1/8" x 3/64" 1/2" x 3/4" 1/8" x 3/64" 5/8" x 1" 5/32" x 1/16" 3/4" x 1-1/8" 3/16" x 5/64" 7/8" x 1-3/8" 3/16" x 5/64" 1" x 1-1/2" 1/4" x 3/32" 1-1/8" x 1-5/8" 1/4" x 3/32" 1-1/4" x 1-3/4" 5/16" x 1/8" 1-3/8" x 1-7/8" 5/16" x 1/8" 1-1/2" x 2-1/8" 3/8" x 5/32 1-3/4" x 2-3/4" 7/16" x 3/16" 2" x 2-3/4" 1/2" x 3/16" Assortments of one size and 19 thicknesses also available.