Timber Decking Drill & Countersink #88G (4.5mm) flat head decking screws Professional clean finish; the ultimate all-in-one, single drilling & countersink tool for timber decking Ideal for: Timber decking (hardwood & composite materials & woodworking) Features: Chrome vanadium (CRV) countersink for clean cutting Parabolic high-speed steel (HSS) drill bit with improved chip extraction, allows for increased feed rates & shorter cycle times Adjustable countersink depth suitable for flush mounting & deep enough to accommodate a plug Free-spinning stop collar with rubber o-ring protects the work surface from marks and scratches When the collar stops spinning the hole is complete Anti-clog design improves visibility & debris removal Also available to suit flat head decking screws: 10G, 12G & 14G Parabolic drill bit: 3.2mm dia (replacement code: DCRD0320-5) Countersink: 6.6mm dia - 60 degree angle - 3 flutes Shank: 1/4in quick change Overall hole depth: 30mm