Use: universal indoor use. Spax-exclusive Wirox surface: 20 times higher corrosion protection compared to conventional bare zinc plating than required by standard As a multi-head pronounced countersunk head for flush countersinking and comfortable processing, milled in wood, brakes on metal. Optimum power transmission and clean fit with Phillips blade size Z2 Effortless work and longer battery life: no pre-drilling (depending on the wood). Easy penetration, reduction of the splitting effect thanks to 4CUT: Four edges in the screw tip. Easier cutting of the wood fibre thanks to Spax wave profile Made in Germany – approved by building authorities: European technical approval for screws as wood fasteners in load-bearing wooden constructions (ETA-12/0114)