Made In the USA. Meets Federal Specifications GGG-V-410, Type VI, Class I. 60,000 PSI tensile ductile iron cast bar & back, Large pounding anvil surface, Deep throat for extra working room, Vise base has (2) mounting holes for securing unit, No Pinch Main Screw Handle, Replaceable Hardened Steel Serrated Jaws, Continuous Rolled Thread on Main Screw. • Made In The USA Using 65,000 P.S.I. High Strength Ductile Iron • Jaw Width: 4 • Jaw Opening: 6-1/2 • Throat Depth: 4