The 135 degree split point is self-centering and reduces thrust.
Sizes smaller than 1/16 and larger than 1/2 have the 118 degree standard point 11/32" Cobalt Heavy Duty Split Point Stub Drill Bit Short, rugged construction performs well in a broad range of materials in the iron and steel families. Screw machine drills are popular in the automotive and construction industries.Screw machine drills (also know as stub or stubby drills) are manufactured to Aerospace Standard 907..