Cobalt 1/4"-28 Threaded Shank Drill Bit
All our cobalt threaded bits are produced from industrial grade premium M42 cobalt steel, 135 degree split points penetrate on contact and prevent "walking". Bits have superior hardness for high temperature applications and are designed for hard, tough, high strength materials. Significantly longer life than regular high speed bits. All threaded bits are 1/4"-28 threads. All bits made in USA.
- Size: #40
- Decimal: 0.0980
- Length: Very Stubby (3/8")