Ribs under the head for improved countersinking.<br />Helix shank for removing debris and to improve clamping.<br />Coated with a patented multi-layer corrosion resistant plating to withstand 1,000 hours salt spray.<br />Patented twin cut technology for rapid "pick-up" and reduces timber splitting<br /><br />TECHNICAL DATA:<br />Thread Dia. mm: 4.5<br />Driver Bit Type: TX Drive<br />Length mm: 65<br />Thread Length mm: 42<br />Size mm: 4.5 x 65<br />Pack Quantity Unit: Pieces<br />Recess Type: TX Drive<br />Head Dia. mm: 7.98<br />Gauge: 9<br />Salt Spray Resistance BS EN 9227 Hrs: 1000<br />Corrosion Rating: 3 - Urban; industrial areas with a low salt atmosphere<br />Included Items: TX20 S2 Bit (Qty 1)<br />Shank Type: Helix<br />Length inch: 2 <br />Driver Bit Size: TX20<br />Thread Type: 40° Single Deep<br />Point Type: Twin-Cut<br />Size imp.: 9 x 2">