Timber Decking Drill & Countersink #1212G (5.5mm) 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: Tungsten carbide tipped (TCT) countersink for clean cutting & 3 times life 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: 8G, 12G & 14G Parabolic drill bit: 4.0mm dia (replacement code: DCRD0400-5) Countersink: 11.0mm dia - 82 degree angle - 2 flutes Shank: 1/4in quick change Overall hole depth: 40mm