RAPid Shims™ and Shim Packs are used for positioning and locating Tooling Components and Dies. Adjustment shims are used to fine-tune the location of your tooling components. (learn more) Die-sharpening shims are placed behind the shim when the face of the die is machined down to sharpen it. Keeping the surface of the die in the precise same location during the stamping, cutting, or forming process.