Easy to use, 5/16” socket for 10 and 12 gauge appropriate driver bit in a power tool. Self drilling type 17 point can pierce light gauge steel up to 0.6mm. Hex flanged heads with EPDM washer provide optimum holding power and seal out wind and rain. EPDM dome washer designed for optimal performance in temperature extremes, UV stabilised, high elasticity. Mechanical galvanising to Class 3 as per Australian Standards. Designed for use with polycarbonate roofing. APPLICATION: For fixing polycarbonate roofing to timber END USER: Plumbers, Roofers, Builders and DIYers FEATURES: Cold forged and roll formed, hex flanged head with EPDM dome washer, coarse thread with type 17 point, made from hardened wire and Class 3 mechanically galvanised