Chicago Power Tools 63519 9-Volt 230-Piece Cordless Rotary Tool Set Variable speed 8000 to 20000 rpms Lightweight compact design for variety of projects Full 227-Piece assortment of rotary tool accessories including cutting, sanding, cleaning, polishing and more.. Handy and practical storage case Accepts all brands of rotary accessories with 1/16-Inch, 3/32-Inch and 1/8-Inch shanks