#71 Cobalt Heavy Duty Jobber Length Drill Bit Sizes smaller than 1/16” or #52, and larger than 1/2” have the 118° standard point. The 135 split point is self-centering and reduces thrust. Heavy Duty 135 Split Point, Cobalt Steel, Jobber Length, manufactured to National Aerospace standard 907..
.Chucking Reamers are designed for accurate reaming in most materials using all types of equipment including screw machines, turret lathes, drill presses, and machining centers.