TEKTON 7580 Nut Splitter Set, 2-Piece Cuts off rusted, cross-threaded or rounded-off nuts without damaging bolt threads Large Screw Drives Generate More Cutting Power Forged and hardened chrome vanadium steel chisel, rugged forged and heat-treated carbon steel frame Set includes: (1) 1/2"-5/8" (12-16mm) nut splitter, 9/16" drive; (1) 5/8"-7/8" (16-22mm) nut splitter, 3/4" drive Quality Guarantee