BUILT TO LAST – Drop forged quality C60 carbon steel is heat-treated to bring the jaws with extra hardness and tenacity. Black phosphating on the surface brings great rust and corrosion protection..HARDENED JAWS & PRECISE TEETH - Heat treated for the whole jaws and the teeth have another high-frequency quenching to enhance the hardness. Precisely machined teeth give a non-slip tight grip..LIGHTWEIGHT ALUMINUM I-BEAM HANDLE – Compared to same-size iron ones, the handle made with aluminum gets an almost 40% lighter weight. Make it more effort-saving, perfect for longtime use..FAST AND SMOOTH ADJUSTMENT – Comes with a full floating forged hook jaw and a non-slip nut thread to adjust the jaw opening easy and rapid. Spring-loaded for high efficiency..WIDE APPLICATION – Exceeds ANSI standards. Perfect for pipe works to tighten/loosen the pipe or remove a stubborn bolt. Size: 450mm(18in). Jaw Capacity: 60mm(2in).