Unmounted. Closely spaced flaps are made of abrasive cloth for fast cutting action with a smooth finish.  Our 400 grit flap wheel is used to remove slight scratches and can also be used for blending after more aggressive grits have been used.  Will leave a much finer finish than might be expected. For use on tapered spindle of buffing motor. Operate at correct motor specification. Flap Wheels will operate at speeds between 1,400-3,000rpm. Made in Thailand.