The Century Drill & Tool 3/8 in. x 4-1/8 in. L Cobalt Steel Stubby Drill Bit with a Straight Shank is purpose-built for high-performance metalworking in tight spaces. Its polished finish and cobalt composition deliver the durability you need when you’re pushing through harder materials, while the stubby profile fits where longer bits can’t reach.
Key specs at a glance
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Drill Size: 3/8 in
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Overall Length: 4-1/8 in
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Flute Length: 2-3/8 in
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Shank Type: Straight Shank
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Material: Cobalt Steel
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Finish: Polished
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Style: Stubby
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Packaging: Carded
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Number in Package: 1
Why the combination of cobalt steel and a stubby design matters
Cobalt steel cutters maintain hardness and cutting performance at elevated temperatures, giving you extended life and reliable results when drilling tough metals. The stubby form factor shortens the overall length, reducing deflection and chatter in confined work areas where maneuverability is key. A straight shank ensures a secure, true bite in common drill chucks, so you get precise starts and consistent hole geometry—every time.
Ideal use cases
- Working in cramped, restricted spaces where a standard-length bit won’t fit
- Drilling through tougher metals and alloys that demand higher wear resistance
- Maintenance, fabrication, and DIY projects that require dependable performance from a single bit
How to get the best results
- Use appropriate drilling speeds for metal and maintain steady, moderate feed pressure
- Apply a light cutting fluid or oil to reduce friction and extend bit life
- Peck drill to clear chips and prevent heat buildup, then resume cutting
- Let the bit do the work; don’t force it through the material to avoid premature wear
Who benefits most
Ideal for professional machinists and serious hobbyists who regularly work in tight tolerances and cramped workspaces. If you need a durable, high-performance drill bit that won’t let you down when space is at a premium, this stubby cobalt bit from Century Drill & Tool is a dependable choice.
