Screw Machine Drill Bit, Drill Bit Size #30, Drill Bit Point Angle 135 Degrees , Split Point, High Speed Steel, Bright (Uncoated), Aircraft Drill Yes, Non-Coolant Through, Cutting Direction Right Hand, Decimal Equivalent 0.1285 These screw-machine length drill bits meet National Aerospace Standards (NAS) 907 Type C for drill bits used in aircraft repair and production. They have a bright finish that is not affected when their cutting edges are resharpened. Spiral-flute drill bits evacuate chips as the bits drill into a workpiece.High-speed steel screw-machine length drill bits provide more flexibility and absorb more shock and vibration than cobalt, powdered-metal, and carbide screw-machine length drill bits, making them suitable for use in manual drilling machines and handheld power tools. They may leave a rough finish on the hole.