High-quality grey cast iron machined to close tolerances will not distort under high pressure. Provides more than 3000 pounds of clamping pressure. Smooth, dependable action from long barreled, unbreakable nut dovetailed into body. Main screw and nut alignment reduces wear for long service. Heavy duty vises designed for professional woodworker/metal worker. Among the most popular general purpose vises for light to medium duty applications Swivel base for easy positioning. Incorporated anvil. Fused steel handle with 2 1/2-inch throat depth and 4 1/4-inch clamping capacity. Safety stop prevents slide from separating from body. Anvil incorporated. IRWIN® Tools Heavy Duty Workshop Vise, 4-inch (226304ZR)