Self-centering punch and die set makes perfect, custom washers, shims and gaskets in seconds. Ten punch sizes: 3, 4, 5, 6, 7, 8, 10, 12, 16 and 20 mm. Nine I.D. pilot sizes: 3, 4, 5, 6, 7, 8, 10, 12 and 16 mm. Cuts steel, brass, copper, aluminum, rubber and plastic effortlessly up to 0.635 mm THK. Cuts stainless steel and blue tempered shim up to 0.25 mm THK. Precision Brand TruPunch punch and die set makes perfect, custom washers, shims and gaskets in seconds by using its exclusive, patented punch, pilot and pin system. No guess work is needed to center the ID and there is no need to scribe center lines. Material waste is reduced by creating a perfect shim every time. Packaged in a durable plastic case.