Hammer end is crowned and hardened to prevent mushrooming and the center is hardened to transmit the hammer blow.Sharply cut Gothic characters ensure a deep, clear impression.. The character end is hardened to Rc 62 to prevent chipping. Purchase as sets or by steel letters & figures 3/32" single figure stamp #0 the individual piece.. Each stamp is individually inspected and marked with SPECS. Smooth, ground taper improves appearance and eliminates cracks that sometimes develop in a rough taper. Made from only the finest quality steel, selected for its proven ability to stand the gaff, then heat treated to three distinct steel letters & figures 3/32" single letter stamp e hardnesses. The characters are cut into the end of a steel bar measuring " (6.4mm) square x 2 3/8" (6.0cm) long. Steel Stamps stocked in 1/16" (1.6mm) and 3/32" (2.4mm) sizes. Hand cut and taper ground to make "factory perfect" impressions when marking custom rifle steel letters & figures 3/32" single letter stamp h barrels and other metal objects you want to professionally identify.