The Fein Sanding Finger is for use in very narrow and hard-to-reach spots in channels, grooves, openings and rabbets. They can also be used for mold-making, on curves and in slots. The finger-shaped plastic plate carrier is designed to prevent damage and marks on the workpiece. It features a hook and loop surface for attaching your Fein sanding finger sheets. This is a 2 pc. pack.