Forged by Medium Carbon SteelThree jaws / two jaws switch easilyThe jaws are hot forged and heat-treated for hardness.To prevent from rust and corrosion, Jaws surface plated with ChromeSix high-strength bolts joint the screw and jaws. The three jaws evenly distribute the pulling force, while the claws of the jaws grasp the gears tightly for damage-free removal.Suitable for dismantling bearings, gears and so on in automotive and industrial industries