10 Piece Spiral Bolt Remover Set Type 420 BR-10
A broken bolt in an engine block, a seized stud on a piece of heavy equipment, or a snapped screw in a casting — left-hand spiral bits are the first tool to reach for before any extractor kit. This 10-piece round shank set covers more sizes than the 8-piece square shank version and mounts directly in a standard drill chuck, making it the right choice for automotive, heavy equipment, and machine shop environments where broken fastener removal is a regular part of the job.
What's Included
- 10 left-hand spiral drill bits — round shank, fits standard 3/8" and 1/2" drill chucks
- Wider size range than the 8-piece square shank set — covers more bolt and stud diameters
- Counter-clockwise flute direction — cutting action works against right-hand threads to loosen while drilling
- Type 420 BR-10 spiral bolt remover design
Specifications
| Pieces | 10 |
| Shank style | Round shank — fits standard drill chucks directly |
| Flute direction | Left-hand (counter-clockwise) |
| Type | Type 420 BR-10 spiral bolt remover |
| Application | Broken bolt, seized stud, and stripped screw removal |
| SKU | DBRS-10 |
Best For / Applications
- Automotive shops — snapped exhaust studs, broken head bolts, sheared manifold hardware, and corroded drain plugs across a wide range of bolt diameters
- Heavy equipment and diesel repair — large studs and bolts on engines, axles, frames, and hydraulic fittings that fail under the stress of years in service
- Machine shops — precise broken bolt removal in steel, cast iron, and aluminum without oversize bore damage
- Fleet maintenance operations — keeping a complete size range on hand so technicians aren't stopped by a broken fastener that doesn't match the 8-piece set
- Field service and mobile repair — round shank mounts in any standard drill driver or reversible drill, no special T-handle required
About Left-Hand Spiral Bits
Left-hand spiral drill bits cut on counter-clockwise rotation — the reverse of a standard drill. When drilling into a snapped bolt with right-hand threads, this means the cutting friction applies torque directly against the thread direction of the fastener. Many broken bolts will begin to back out before the bit has penetrated more than a fraction of an inch, eliminating the need for a separate extractor entirely.
The round shank on this set fits directly in any 3/8" or 1/2" drill chuck, which matters in real shop use: you can run it in a reversible drill driver without adapters, and the larger 10-piece range means you're more likely to have the right diameter for the bolt in front of you.
Left-hand drilling is a first-attempt approach that preserves the most options. It removes material slowly and in the correct direction to encourage the fastener to loosen. If the bit passes through without catching the bolt, you still have the original bore — clean and centered — ready for a standard extractor kit or a helicoil repair. Drilling right-handed first removes that option.
Prefer a square shank for T-handle use? See the 8-piece square shank bolt remover set.
Shipping & Ordering
- Ships within 1–2 business days from our warehouse
- Volume pricing available — contact us for multi-unit shop orders
- B2B accounts: Fleet managers, facilities teams, and machine shops can apply for a business account with custom pricing and a dedicated rep — contact us to get started