Bench Clamp Vise 4 Inch Accuracy Mill Vise without Base Specification: Jaw width - 4 inch Jaw opening - 4.56 inch Jaw height - 1-1/4 inch Features: Vise bed is made from grey cast iron and the maximum tensile strength of the vise bed is 28,000 PSI, K type angle lock nut is made from the highest quality ductile Iron, firm and durable This vise is so designed that the horizontal force generated by tightening the handle pushes the semi-sphere within the movable jaw and thus thrusts the movable jaw downward 4 Screws from the top through the jaw reduce key's side force and make the vise body not easy to broke, extend vise life, sliding surface of the vise bed is flame hardened and ground The accuracy milling drilling vise is suitable for milling, drilling machine and accuracy parts finishing Package Includes: 1 x Bench clamp vise 4 inch accuracy mill vise