Use: universal indoor and outdoor use without direct weathering. 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 even when processing overhead with SPAX bit T-Star plus T20 with guide pins 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-typical 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), Weight: 3.4392112872 Pounds, Manufacturer: Spax