A latch-attachment, pop-on mandrel for use with sof-lex contouring and polishing discs and sof-lex extra-thin contouring and polishing discs. Refill includes three RA mandrels. 3M ESPE 1983RA RA Mandrels Refill, Pack of 3. Low-profile mandrel design reduces risk of marring the restoration for easier use and improved results. Mandrel for use with sof-lex contouring and polishing discs. Soft-flex extra-thin contouring and polishing discs. . .