Shaft Arbor, Fits Shaft Diameter 1/4 in, For Use With Smaller Fractional Horsepower Motors, Includes Flanged Washers, Hex Nut, Thread Length 1 1/8 in, Thread Size 3/8 In.-24 LH, Washer Outside Diameter 1 1/4 in, Maximum Wheel Width 1/2 in, Setscrew Type Socket, Shaft Rotation Clockwise, Overall Length 2 in, Type Small, Application Mounting Various Buffing and Finishing Wheels on Electric Motors