Heated treated alloy steel for heavy duty applications .401 in. Shank diameter Includes Tapered Punch (7/64 in. tip dameter). Suggested Applications: Punching holes in steel metal, driving rivets or hinge pins Includes Slitting Chisel (1-1/8 in. blade width). Suggested Applications: Cutting round steel tubing and tail pipes. Concave design holds cutting edge Includes Flat Chisel (5/8 in. blade width). Suggested Applications: Cutting, scraping and material removal. (Paint, tile, plaster and roof coatings) Includes Cold Chisel (1-1/16 in. blade width). Suggested Application: Cutting bolts, nuts, tees and angles. Also splits and bevels Includes Muffler Cutter (5/8 in. blade tip). Suggested Application: Cutting mufflers and exhaust pipes