Irwin Cobalt Drill Bit Set

– HSS Cobalt Drill is 135 degrees Split Point Grinding ensures perfect centering and reduced drilling pressure.
– Ground Flute industrial quality ground flute for high accuracy drilling and fast removal of chips
– Cobalt Alloved drill bit body manufactured from high quality HSS steel containing 5% Cobalt.
– The added 5% Cobalt improvs the red hardness(heat resistance) of the drill bit and results in significantly extended life
– Surface finish golden tempered surface