Dewalt dt 681012 pilot bits and 4 cutter countersink dewalt dt7606 qz this 10 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 dt7606 qz 10 pilot bit amp 4 cutter countersink