Dewalt dt 681012 pilot bits and 4 cutter countersink dewalt dt7607 qz this 12 pilot bit and 4 cutter countersink from dewalt is a great accessory for both tradesman and diy enthusiast as it provides a clean professional finish ideal for drilling pilot holes and countersinking in one action and suitable for using on hard or soft wood composite board and mdf dewalt dt7607 qz 12 pilot bit amp 4 cutter countersink