Metal drill bits ground from solid, extremely heat resistant 5% cobalt-alloyed high speed steel. Suitable for drilling high alloy content steels and metals with tensile strengths over 1000 N/mm² such as stainless steel. Features Quad Edge tip, combining 135° split point for fast, precise drilling start without walking, and 4 cutting edges, creating smaller chips to prevent heat build-up and prolong bit life. Bits larger than 5mm diameter feature 3-flat shank for better grip and to prevent chuck slippage. Wide core towards drill bit shank adds core strength and increases overall flute durability. High-Speed Steel Straight Shank 1mm-13mm Dia. Drill Bits Suitable for Metal 5% Cobalt-Alloyed HSS Tip Fits Any Chuck 10mm or Larger Colour: Bronze High-Speed Steel Straight Shank 1mm-13mm Dia. Drill Bits Suitable for Metal 5% Cobalt-Alloyed HSS Tip Fits Any Chuck 10mm or Larger Colour: Bronze