Dewalt dt 681012 pilot bits and 4 cutter countersink dewalt dt7605 qz this 8 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 dt7605 qz 8 pilot bit amp 4 cutter countersink