The DeWalt four cutter countersink provides a clean, professional finish. They are ideal for drilling pilot holes and countersinking in one action and can be used on hard and soft wood, composite boar more→d and MDF. Features & Benefits • Four cutter countersink and tapered drill bit provide superior speed and ideal finish • Replacement tapered bits offered • Can be used on hard and soft wood, composite board and MDF Specifications • Accessory type: No. 8 Pilot Bit and No. 4 Countersink Cutter • Shank: 5/16"