FEATURES " Drill bit quality: High quality high speed steel ground from solid. " Tip geometry: Split point DIN 1412 C. Point angle: 135°. " Flute: Thunderweb design. Reception: ¼? Hex (DIN 3126 - E 6.3). " Surface / Colour: black oxide. Right hand cutting edge. " Application: Suitable for drilling in steel, cast iron, alloyed and non-alloyed material up to 900 N/mm² and wood / plastics. " Thunderweb parabolic shaped web is characterised by larger web cross section for extra strength. " Accepts higher feed pressure and torque for longer lifetime. " Thunderweb flute is an open flute with flatter twist angle for smaller chippings, ideal for drilling harder steels i.e. stainless steel. " Ejects hot chips rapidly, dissipates heat better increasing lifetime. Contents: ø 3 / 4 / 5 / 6 / 7 / 8 mm.