Bahco 6221 Box Joint Water Pump Pliers are made from high performance alloy steel with a phosphate finish. Anti-corrosion treated for increased durability.The narrow head design allows for great accessibility in confined spaces.The teeth have been hardened (60 HRC to 62 HRC) for a long product life and strong gripping on any shape.They have a 35% bigger mouth opening compared to market standard.Fitted with slimPVC dipped handles.