Professional Drill Bits - Made of 5% Cobalt High Speed Steel with heat treament and hardness up to HRC 67, Ideal for drilling in cast iron, stainless steel, hard metal, copper and so on
Superior Performance - Provides upgraded M35 Cobalt drill bits for high-temperature applications for extended periods of time and delivers 5x life vs. Standard bits
Drilling a Precise Hole - 135 degree pilot point tip design to help reduce walking, Straight round shank design with better concentricity for precise drilling results
Efficient - Tapered web helix design provides additional stability in tough applications, Large spiral flute facilitate the export of metal chips remove for fast drilling results
Instructions for use: Due to the large diameter of the drill, it is need to pre-drill small hole for best results. Drill bit is a consumable item, it will not be sharp enough with prolonged use, you can be to sharped it for continue use
