With adjusting screw and release lever, model 137 10 with blue dip-insulated lever. 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.