Metabo 19pc HSS-TIN Twist drill bit set (TiN) Key Features: Metal drill bits, HSS-TiN, titanium alloy version, ground, cylindrical, type N, 135° crosswise grinding, gold surface, in metal case Ø 1-10 x 0.5 mm; Suitable for drilling steel and cast steel, alloyed and unalloyed, grey cast iron, non-ferrous metals, plastic; up to 900 N/mm² tensile strength. Not suitable for aluminium.