The Astro Pneumatic 12-Piece Large Cold Chisel and Punch Set, No. 1612, is made with heat-treated drop-forged steel. The set offers high Rockwell hardness, but low enough to prevent chipping and cracking from heavy hammering. Each blade is designed for the best balance between edge sharpness and edge strength. Tapered punches drive out pins and broken fasteners and use through-holes to align parts to assist assembly. The set includes six cold chisels (1" by 10", 7/8" by 10", 13/16" by 8", 3/4" by 8", 5/8" by 7" and 1/2" by 6.5"), four punches (3/8" by 10", 3/16" by 10", 1/8" by 5.75" and 3/8" by 8") and two center punches (8" and 5.75").