Shims are small metal spacers that are used to give accurate spacing to grinding tools, saws, milling cutters, and much more. Metal shims can also be used to seal joints, and as electrical insulations. Shims come in pre-cut kits or as raw shim stock, such as stainless steel sheets, so you can cut shims to your exacting needs. We have pre-cut shim stock assortments and arbor shims, in many shapes and sizes. Zoro has stainless steel tubes and aluminum channels too.