Milwaukee® Thunderbolt® Secure-Grip™ General Purpose Jobber Length Drill, 5/16 in Dia x 4-1/2 in L, HSS, Black Oxide
- Flute Type: Parabolic
- Shank Type: 3-Flat
- Overall Length: 4-1/2 in
- Applicable Material: Metal, Plastic and Wood
- Cutting Depth: 3-3/16 in
- Cutting Edge Material: HSS
- Drill Size - Fractional: 5/16 in
- Finish: Black Oxide
- Flute Length: 3-3/16 in
- Material: HSS
- Point Type: Split
- Type: General Purpose
Milwaukee® Thunderbolt® Black Oxide jobber length drill bits are designed for extreme durability and long life. The Thunderbolt web features a thicker core than a standard drill bit to provide ultimate strength and protect against side-load breakage. A specially designed parabolic flute form clears chips fast, while the 3-Flat Secure-Grip™ shank holds the bit firmly in the drill chuck. The 135 deg split point tip delivers a precision start and prevents walking for fast, accurate holes. Effective for drilling on curved surfaces, Milwaukee® Thunderbolt Black Oxide bits require less effort to drill through metal, wood and PVC and are highly recommended for use with portable drills.
- Thunderbolt® thicker web provides greater strength and longer life
- Parabolic flute, clears chips faster
- 135 deg split point, precision start no walking
- Black oxide coating provides lubricity and resists corrosion of the bit
- 3-flat Secure-Grip™ shank holds the bit firmly in the drill chuck
Milwaukee® Jobber Length Drill | General Purpose | Series: Thunderbolt® Secure-Grip™ | 5/16 in Dia | 4-1/2 in Overall Length | 3-3/16 in Cutting Depth | Parabolic Flute | 3-3/16 in Flute Length | 3-Flat Shank | 135 deg Point | Split Point | Right Hand Cutting | HSS Cutting Edge | HSS | Black Oxide | Applicable Materials: Metal | Wood and Plastic