Special characteristicsFor Nirosta steel, V2A steel, iron, cast iron, non-ferrous metals, aluminium, plastics, wood, HSS = hardened high-speed steel in special alloy, noticeably faster drilling performance, significantly longer service life and less heat generation compared to conventional drills due to special point grinding, extremely suitable for cordless drills, from Ø 3.5 mm self-centring point for fast, clean pilot drilling without centre punch, point with precise special grinding = sharper cutting edges, special cutting edge profile for clean bore exit, specially ground side cutting edges for clean chip removal, shank with 3-face grinding, from Ø 5.5 mm (firm seating in drill chuck does not slip), for steels up to tensile strength 900 N/mm2 (shank diameter equal to drill diameter).Technical data material: HSS drill diameter: 4.0 mm drill length: 75 mm working length: 43 mm content 2: 1 pc