Power through hard metals with precision using the Century Drill & Tool 1/4 in. x 3-5/16 in. L cobalt steel left-hand drill bit with a straight shank. This single-carded bit is built for durability and versatile metalworking applications, delivering dependable performance when the going gets tough.
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Material: Cobalt steel for enhanced hardness and heat resistance compared to standard high-speed steel
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Finish: Polished surface to reduce friction, promote smoother chip evacuation, and extend bit life
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Size & reach: 1/4 in. drill size with a total length of 3-5/16 in. and a flute length of 1-3/4 in. for deeper holes and efficient chip clearance
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Shank: Straight shank for compatibility with most drill chucks and drill presses
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Style: Left-hand (reverse-cutting) geometry designed for specialized tasks such as reverse drilling and fastener extraction
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Packaging: Carded packaging for easy storage and single-piece convenience
Why this cobalt left-hand drill bit stands out
Unlike standard HSS bits, this cobalt steel bit holds its edge under high heat, making it ideal for drilling through tough metals like steel, stainless, and cast iron. The polished finish helps minimize built-up heat and reduces resistance, so you can maintain consistent cutting performance across demanding jobs. The left-hand orientation isn’t just a novelty—it's a value-add for reverse drilling applications and for situations where you need to back out a fastener or start a hole with a reverse motion.
Ideal use scenarios
- Drilling in hard metals where heat buildup would quickly dull ordinary bits
- Projects requiring a reverse-cutting approach, such as reverse drilling or fastener extraction
- Applications in metalworking shops, fabrication benches, and DIY projects involving steel, stainless steel, or cast iron
- Operations that benefit from a straight shank for reliable grip in standard chucks
Practical tips for best results
- Use appropriate cutting fluid or coolant to extend bit life and improve performance
- Start at a moderate speed and increase gradually as you verify cut quality
- Let the bit do the work—avoid applying excessive pressure to prevent dulling or chipping
- Keep the bit cool and clear of debris to maintain a clean, accurate hole
Designed for professionals and serious hobbyists alike, the Century Drill & Tool 1/4 in. cobalt steel left-hand drill bit with a straight shank is a focused, purpose-built solution for challenging metal drilling tasks. Add it to your toolkit to tackle hard metals with confidence, backed by Century’s legacy of reliable tooling.
