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Durable corrosion protection: the Wirox A9J surface is chrome (VI)-free, particularly hard and reliably protects against rust - for solid wood connections indoors and protected outdoor areas Efficient work: the 4CUT tip and the wavy thread reduce splitting, usually make pre-drilling unnecessary and allow powerful screwing in with reduced energy requirements Maximum power transmission: the T-Star plus T30 force grip with guide pins sits firmly in the screw head - prevents slipping and transfers high torque safely, ideal for heavy screw connections Firm constructions: the partial thread pulls strong components together powerfully - the multi-countersunk head ensures flush countersinking in the wood and brakes on metal to protect fittings German precision: our high-quality SPAX screws stand for tested quality "Made in Germany" – developed for durable, stable constructions in the professional and DIY sector