General International 70-905 Mortising Attachment Kit Features: * Convert almost any drill press into a mortiser in minutes! What"s In The Box: * Mounting Hardware * Cast-iron Chisel Holder * Guide Fence with Workipiece Hold Down * Four Commonly Used Mortising Chisel and Bit Sets with 5/8-Inch Bit Shank - 1/4, 5/16, 3/8 & 1/2-Inch * Adapter Hardware Including 6 Bushings (4 Two-Piece & 2 Split Style) to Fit Most Drill Presses with 52, 55, 58, 60, 65 & 66 mm Quills