· Surface: TIN coated · DIN 7422 · Made in Germany · Drive: 1/4 inch (6.3 mm) square, hollow · Output: Inside hexagon profile · Wrench size: 7 mm · Dimensions / length: 28 mm · Length l1: 6.5 mm · For manual operation. Why choose TiN (Titanium Nitride) coating?. A special coating process for extremely hard TiN coating guarantees high adhesive strength and wear resistance of the coating. Particularly suitable for continuous load, e. g. for industrial applications in industry and trade. Higher wear protection guarantees a longer lifetime. Perfect fitting accuracy due to optimum coating thickness. Optimized corrosion protection.