#80 Cobalt Heavy Duty Jobber Length Drill Bit Cobalt jobber drills. The 135 split point is self-centering and reduces thrust.Sizes smaller than 1/16” or #52, and larger than 1/2” have the 118° standard point. Heavy Duty 135 Split Point, Cobalt Steel, Jobber Length, manufactured to National Aerospace standard 907.
. The 135 degree split point is self-centering and reduces thrust.They have a black oxide surface treatment that is abrasion resistant, reduces chip welding and improves chip flow. Sizes smaller than 1/16 have the 118 standard point.