Viking Drill and Tool 43690 Type 260-T 135 Degree Split Point Black Heavy Duty Stub Length Drill Bit Set (13 Piece) 13 pc. Set Screw Machine Length Heavy Duty 135-Degree Split Point 1/16 - 1/4 by 64ths, 135-Degree split point High speed steel provides good wear resistance, can be used in general purpose applications for ferrous and nonferrous materials Black oxide prevents chip building, galling and welding. Commonly used for low carbon, stainless and ferrous metals NAS 907C Screw Machine Length