Designed for the professional plumber and electrician who needs to make large and rough holes in wood. Bosch offers a complete line of wood boring bits for heavy-duty and fine woodworking applications. Replaceable blades (extra blade included) are optimal for professionals seeking to eliminate downtime and increase productivity. Hex shank for reduced slippage. Chip lifters and spurs can be re-sharpened to maximize bit life. Deep cutter gullets prevent stalling and provide smoother drilling. Replaceable threaded tip and hex key included.