High Performance Wood Screw 6.0 X 80mm Pozi Drive Flat Countersunk Double Head Screws 6.0 X 80mm For Hardest Hard Wood Fence Floorboard Hard And Softwood - Pack of 20 Hardened Steel Pozi Flat Countersunk Head High Performance Wood Screws are specially designed for exceptional performance . Hardened Steel Pozi Flat Countersunk Head Screws with Serrated Threads to cut into the wood with less effort and improve performance. Cutting flute to help penetrate the hardest of hard woods. Integral ''reamer'' to speed action where no threading required. Ribs under head to aid countersinking. Pozi drive screw can easily be distinguished by a line embossed in the screw head at 45 degree to the slots for the driver. The countersunk head is designed to sink flush with substrates to leave a smooth surface finish.
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