This handy set of brass shims is ideal for use with your Swanstrom disc cutter sets; the eight hard-milled shims range in thickness from 14-gauge to 28-gauge in 2-gauge increments. Each 1" x 2" shim is deeply etched with its gauge size, making it quick and easy to get the shim you need without fumbling or guesswork. The set of eight shims is held on a 1"-diameter steel split ring that keeps all the sizes together and readily accessible as you work.
To use, set the shim matching the metal thickness you are cutting between the disc cutter plates opposite the die opening for the disc you are going to cut. When you tighten the cutter on your metal, the shim keeps the cutter plates stay perfectly parallel, which ensures that the disc is cut cleanly and evenly when you strike it with the die.