The Performance W50037 146-Piece Rotary Tool Assortment provides compounds and attachments for many of your grinding, sanding, cutting and buffing needs. Drill bits are also included in the W50037. The Performance 146-Piece Rotary Tool Assortment fits in a single convenient carrying-case. Features: 146-Piece rotary tool assortment includes drum sanders, polishing stones, cutting wheels, buffing compound, drill bits and more. All-Pieces are housed in one convenience carrying-case What"s In the Box: Performance W50037 146-Piece Rotary Tool Assortment, carrying-case.