Product Features: Heavy duty, used extensively in oil, gas and civil engineering sectors Frame and handle are a one piece ductile iron casting Replaceable drop-forged, hardened and tempered jaws One piece ductile iron casting, which is very strong Adjusting nut is hardened and tempered for maximum strength Both jaws are made from drop forged steel with hardened and tempered teeth Brand: Irwin Model Number: T350/18 Hand Tools Type: Wrenches Color: Blue Pipe Capacity: 2.1/2 inch Bore Weight: 2.72 kg Size: 18 x 2.5 Inch.