Shaft Arbor, Fits Shaft Diameter 3/8 in, For Use With Dayton Keyless Chucks to Drive Various Shank-Mounted Power Tool Accessories, Includes Hex Nut, Machined Washers, Thread Length 2 5/8 in, Thread Size 1/2 In.-20 RH, Washer Outside Diameter 1 1/2 in,...