Features: Hardened vise bed/jaw plates Semi-hard steel screw 80,000 PSI ductile iron body, nut and movable jaw New wider 4 bolt stationary design fastens from the top Bolts & locates on 40mm, 50mm and 2" grid patterns Accepts sine keys for alignment (not included) Chip evacuation straight through the body Screw support held in place with snap rings New brush seal design makes it easier to replace Powder coat paint is long lasting and durable Matching of the bed heights or keyway to stationary jaw