EXPERT CYL-9 MULTI CONSTRUCTION DRILL BIT FOR IMPACT DRILL/DRIVERS, FOR ROTARY DRILLS/DRIVERS High Precision Drilling Multiple Materials Accurate drilling is easy with Bosch Centering Geometry Start holes accurately with a specially-designed centring tip. Cylindrical shank compatible with three-jaw drill chucks Technical Data Diameter 6mm Working Length 200mm Total Length 50mm Quantity 1