Hazet 8801K-4 4mm Hex TiN Socket 3/8" Short Extra short design With knurling Surface: CVD-TIN coated DIN 7422 Made in Germany Wrench size: 4 Total length: 43.5 mm (Blade) length l1: 17 mm Drive: Square, hollow 10 mm (3/8 inch) Output: Inside hexagon profile Net weight: 0.03 kg * = Not according to DINWhy choose TiN (Titanium Nitride) coating?A special coating process for extremely hard TiN coating guarantees high adhesive strength and wear resistance of the coatingParticularly suitable for continuous load, e. g. for industrial applications in industry and tradeHigher wear protection guarantees a longer lifetimePerfect fitting accuracy due to optimum coating thicknessHigher torqueOptimized corrosion protection 8801K-4