Forged, tempered jaws and special jaw shape for secure gripping, clamping and holding, GEDORE vanadium steel 31CrV3, nickel-plated, Jaw body in high-tensile sheet steel, Automatically welded upper jaw - absolutely firm connection with the sheet steel body, Well-conceived jaw design guarantees a three-point contact with all material cross-sections, Threaded bore welded at bottom, No widening under most extreme loading, Safe release, Release lever under constant pressure of special spring, Release lever under constant pressure of special spring