These vices are specially designed and manufactured to ensure perfect alignment and smooth movement. BODY Shock resistant cast iron , free from sand holes , pits , blow holes , scabs and other imperfections found on inferior vices SPINDLE NUT Unbreakable malleable steel nut for extra tuff grip JAWS Made of special carbon steel properley heat treated , ground and serrated to ensure a fast non slip operation SPINDLE SCREW The spindle screw is fine pitched and made of selected steel to match the nut for long & durable life Jaw Width - 125 mm - Jaw Opening - 150 mm - Jaw Depth 55 mm