Velcro sanding pad SIZE :3'', 4" ,4.5",5",6",7" HOLE: 4 hole, 5 hole, 6 hole, 7hole, can do as your request. USAGE : VELCRO DISC AND PSA DISCMAX OPERATION SPEED : 10000R.P.MPACKED : AS THE PICTURE SHOW OR AS YOUR REQUEST. velcro sanding pad,backing plate of wool pad