High quality vice made from drop forged steel and surface-hardened for long life. The double acme thread screw allows faster adjustment of the jaw opening and is enclosed to keep dirt and debris out of the mechanism. Pipe jaws forged integral with the body, Solid Body: Drop-forged from high quality steel. Drop forged. Induction hardened. (54-58 HRC) Solid with the body. Ideal for straightening or similar jobs requiring strong and flat surface. Unbreakable