Unique design with deep interior hole giving superior driver bit connection and optimum driving torque from power tool. No risk of bit jumping out therefore no risk of scratching protective coating. Innovative Reisser recess with interior hole, Tornado ribs, Threads under the head, Reduced parallel shank, RMB - nano coating, Single thread, Patented 25deg spiral point with cut. Free driver bit included. Designed to accept a standard square drive No. 2 bit as well as the innovative Reisser Recess bit. Eases countersinking to prevent any splits or damage around the screw head. Threads under head allows screw to lock tight into decking giving no board movement and superior fix. Reduced Parallel Shank reduces board friction to assist easy driving and allows decking to be screwed down tight without pre-drilling. RMB - Nano Coating gives MINIMUM 2000 hours protection on a salt spray test. Nano coating prevents recess clogging ensuring good driver bit fit and reduces coating peel off in timber. Hex-chromium free. Single Thread centres up the screw after rapid insertion and gives excellent holding power in the timber frame. Patented 25deg Spiral Point with Cut gives immediate start. 3 Separate 'intro' threads give rapid acceleration into the decking. 10mm Single Cut reduces splitting. Reisser Decking Screw Tub 4.5 x 63mm (200 Pack) in Gold. Reisser Deck Screws are designed to give the optimum solution for fixing deck boards. The fast start Spiral Point with a cut gives instant grab and a pre-drill function to help eliminate splitting a wide single thread centres the screw quickly and this coupled with the Reisser lubricant and the reduced parallel shank reduces friction which means faster insertion with less power. The specially hardened steel provides increased ductility with a min 30 degree bending angle reducing the risk of shearing through timber expansion. The unique Reisser Recess gives a stick fit connection, provides maximum torque transfer, and eliminates cam out preventing any scratching of the coating. The drive can also accept a standard SQ2 bit and still provide a stick fit. Tornado ribs under the head ease countersinking leaving an attractive finish. A superior fixing is achieved by the two different thread patterns, the second thread under the head is designed to engage with the board to prevent movement whilst the wide, deep thread on the shaft provides high pull out resistance into the joists, result = no board movement. The bronze Nano KTCO coating has been tested to a min 2000 hrs Salt Spray resistance, is Cr-6 free and resists peel off in timber giving long lasting protection. All three sizes are available in large volume Industry packs and are packed it durable, weatherproof plastic packaging. Manufactured in the same factory as the Cutter you can be confident of the Reisser Consistency of Quality.