Powertec 8mm Cryo-Cobalt Drill Bits For Hard Metal 91615

Designed for longer life when drilling out spot welds in the new generation of ultra high strength steels.

-CryoCobalt drills are unique due to the micro-sharpness created by using added Cobalt, which makes them ideal for working on Spot Welds in high-strength steels & ultra high-strength boron steel.
-In independent testing, CryoCobalt drills typically outperformed standard HSS drills by up to 5 times, & HSS Cobalt drills by up to two times (UKAS acredited test house ).
-CryoCobalt drills last longer, resist higher temperatures, retain their strength better than standard HSS or Cobalt drills, & can be re-sharpened when necessary.
-Made from CM-88 chrome molybdenum high heat steel patented Cryophase thermal cycling cryogenic treatment.
-Drills material up to 58HRC hardness at temperatures up to 650C, created by the addition of 8% added cobalt (compared with std HSS Steels), 135 angle split drill point with gold-oxide coating.