Robust chrome molybdenum (cr-mo) steel construction for maximum durability works great with nut letters, hollow sockets, threaded rod drivers and more Adapts 1/2” square drive impact wrenches to 1/4” hex for use with standard 1/4" Hex shank driver bits Fits 12 inch square drive impact wrench to 14 inch hexagonal for use with standard 14 inch hexagonal shank driver bits Provide hexagonal socket, Weight: 0.2645547144 pounds, Manufacturer: Makita