IRWIN Record Arm Adjusted High Tensile Bolt Cutters have jaws that are specially heat treated for cutting very hard materials up to a hardness of Brinell 500 (Rockwell C52, 110 tons/square in). The Centre cut jaws have a short nose for trouble-free cutting of pre-stressed concrete reinforcing rods, mesh and wire, high tensile steel rods, bolts and case hardened chain, cold drawn alloy steel and tempered sprung wire. The Record IRWIN REC942H Arm Adjusted High Tensile Bolt Cutters have the following specifications: Overall Length: 106cm (42 inch). Max Cutting Capacity 12.7mm (1/2 inch)