Irwin® 31520 Fractional Mechanics Length Drill Bit, 5/16 in Dia x 3-3/4 in L, M42 HSS-Co 8, Gold Oxide
Irwin® Mechanics Length Drill Bit, Fractional, Series: 305, 5/16 in Dia, 3-3/4 in Overall Length, 2 Flutes, Spiral Flute, 2-1/8 in Flute Length, Cylinder Shank, 135 deg Point, Self-Centering Split Point, Left Hand Cutting, M42 HSS-Co 8 Cutting Edge, M42 HSS-Co 8, Gold Oxide, Applicable Materials: Sheet Metal, Mild Steel, High Alloy Steels, Stainless Steel and Cast Iron
- Constructed of M-42 8 percent cobalt high speed steel for super abrasive resistance in tough metals
- Heavy duty spiral flute design produces faster chip ejection
- Shorter cutting lips reduce torque for drilling in high tensile strength materials
- 135 deg split point reduces feed pressure for easier penetration without work hardening
- Best for portable drills
- Requires less force than 118 deg
- Drill into fasteners without tightening them
- Can often remove broken fasteners without an extractor
- Ideal for use with screw extractors
- Non-coolant through