"The Wilton Combination Pipe & Bench Vise features steel jaw faces made from hardened tool steel that have a deep knurled pattern to ensure strength and longevity. U.S.A. Double Lock-Downs Yes, Jaw Width in. 5 1/2, Pipe Jaw Yes, Replaceable Jaw Yes, serrated, 360 Swivel Base Yes, Jaw Capacity in. 6, 1/8-4 1/2 pipe. Strong ductile iron main castings are guaranteed for life against defects in workmanship and materials Pipe jaws are interchangeable and reversible Pipe jaws doe not protrude beyond the jaw faces, so other work can be held without removing pipe jaws Swivel base rotates 360 and gear lock bolt ensures positive locking against slippage"