Stub Drill Bit, Left Hand, Cobalt Steel, 5/16-in.

Discover the 5/16" Left‑Hand Cobalt Stub Drill Bit, a compact powerhouse built for extracting damaged right‑hand threaded fasteners. Crafted from high‑grade cobalt alloy and finished with a sleek polish, this short‑shank tool delivers exceptional rigidity while fitting into tight spaces where standard bits cannot reach.

Why it matters: The specialized left‑hand twist instantly backs out broken bolts without the risk of further tightening, saving you time and costly downtime. Its robust construction resists wear even under high‑temperature drilling, making it ideal for automotive repair, industrial maintenance, and heavy‑equipment service.

• Left‑hand rotation: Designed to reverse‑thread broken studs, providing a reliable extraction solution for mechanics and technicians.
• Compact stub length (3.75" total): Short overall profile enhances torque transmission and grants access to confined areas.
• 2.125" flute depth: Sufficient cutting length for rapid material removal while maintaining stiffness.
• 135° split point geometry: Sharp, self‑centering tip reduces walk and ensures precise entry into hardened steel.
• Premium cobalt steel composition: Offers superior heat resistance and extended lifespan compared with standard high‑speed steel bits.

Engineered for performance: Whether you’re tackling stubborn engine bolts, extracting seized studs, or performing routine maintenance, this cobalt stub drill bit delivers the strength and accuracy professionals demand. Its polished surface minimizes friction, while the left‑hand design turns adversity into an easy win. Choose this resilient tool to keep your workshop efficient, your projects on schedule, and your equipment operating at peak reliability.