Made of 60,000 PSI tensile ductile iron for long lasting durability. Large anvil work surface, wide vise jaws and precision turned sidebar provide easy operation and maneuverability. Wider jaws provide greater clamping surface. 360° swivel base features double lockdowns. Fully enclosed spindle and nut increases life of vise. Jaw opening is 7". Jaw width is 8. Throat depth is 4-3/4". Pipe jaw capacity is 1/8" to 3-1/2". Lifetime Limited Warranty.