For general purpose use, designed for cutting medium steel and soft bolts, nuts, rods, chain, etc. Maximum hardness of material to be cut: Brinell 370/Rockwell C42, 85 Tons/Sq. 133 Kg/square mm. Jaws are made of drop forged high grade alloy tool steel with heat treated, precision cutting edges for longer cutting life. Comfortable rubber handles for gripping firmly and safely. Exceeds U.S. Federal specification number GGG-C-740d Type II.