BOSCH SP515 4종 육각 생크 이중 드릴 비트 세트 #6, #8, #10, #12.

["Four-piece set includes no. 6, 8, 10 and 12 hex shank screw pilot bits","Countersink screw pilot bits – designed for hex shanks for countersinking precision pilot holes","One-step operation – provides countersinking and counterboring in one operation","Replaceable drill bits – for longer accessory life","Adjustable Countersink depth – for use with an Allen wrench"]