3M Stikit Disc Pad 05575, 5 in x 3/4 in x 5/16-24 ExternalProvides excellent disc attachment yet allows quick, easy disc removal Back up pads enable use of 3M Stikit discs (sold separately) on a disc, random orbital, or rotary sander Variety of densities provides flexibility for varied finishes Dust Free (D F) disc pads allow dust extraction capability Variety of attachment interfaces allow use with common power tools Holder enables use of 3M Stikit discs (sold separately) on a right angle grinder or sander