Features
- Self-feed spur to assist penetration through wood
- Cutting geometry designed to extend bit life
- Open-tooth design allows resharpening
- 7/16" ball-groove quick-change shank for fast bit changes and chuck compatibility
- Hardened extension body with double set-screw locking to secure the bit
Specifications
| Length | 12 in |
| Application Material | Wood |
| Head Type | Self Feed |
| Is It A Set? | No |
| Number Of Pieces | 1 |
| Product Diameter [In] | 7/16 |
| Product Pack Quantity | 1 |
| Shank | 7/16" ball-groove quick-change |
| Includes | (1) Extension |
| Warranty | Not eligible for warranty |
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12-inch extension for self-feed wood-drilling bits. Provides extended reach for drilling rough holes in wood (for running pipe, cables, or ductwork). The extension has a hardened body and a double set-screw locking system to retain the bit. It uses a 7/16" ball-groove quick-change shank compatible with quick-change tools and standard chucks.
Project Ideas
Business
Old-home retrofit drilling service
Offer a specialized service to drill through stacked plates, fire blocks, and tight framing bays for electricians and low-voltage installers. The 12-inch extension and self-feed geometry make quick, clean rough-in holes with minimal wall damage. Package pricing per hole or per run, with moisture/utility scanning and code-aware boring practices.
Custom beam lighting shop
Design and sell reclaimed-beam chandeliers and linear pendants with fully concealed wire paths. Use the extension to pre-drill long channels and exit points, then finish, wire, and ship as ready-to-hang fixtures. Offer size options, stain/finish choices, dimmable drivers, and installation services for local clients.
Raised-bed irrigation kits
Produce garden bed kits with timbers pre-bored to route 3/4 in PVC or poly manifolds inside the frame. The long-reach extension keeps runs straight through multiple timbers. Include grommets, manifolds, and quick-connects; upsell installation or design services for multi-bed layouts.
Pergolas with concealed power
Build and install post-and-beam pergolas pre-drilled for hidden wiring to power fans, heaters, and string lights. Use the extension to run end-to-end channels through posts and beams so no conduit is visible. Market to landscapers and homeowners; offer add-ons like smart controls and weatherproof junction boxes.
On-call rough-in drilling for trades
Provide a mobile, rapid-response pre-drilling service for plumbers, HVAC, and low-voltage pros who need large, clean holes in thick framing or awkward spaces. Quick-change shank speeds bit swaps, and the hardened extension with double set-screws keeps bits secure in overhead or inverted drilling. Bill hourly with a minimum call-out fee.
Creative
Beam chandelier with concealed wiring
Turn a reclaimed beam into a multi-pendant chandelier by drilling long, end-to-end wire channels and drop exits at set intervals. The self-feed bit and 12-inch extension let you bore deep through knots and thick timber so all wiring is hidden. Add strain relief bushings at exits, a junction cavity at one end, and hang with forged hardware for a rustic showpiece.
Marble-run timber blocks
Make a modular marble-run from 4x4 or 6x6 offcuts by drilling intersecting tunnels and angled passes. The large self-feed holes create fast, smooth channels; cap openings with thin hardwood plates or magnets to create windows. Sand, oil, and mix block types (straight, cross, drop) for a tactile STEM toy.
Hidden cache fence post
Bore a deep, centered hole into the top of a 6x6 fence or gate post to house a capped PVC tube. The extension helps reach well below the cap so the stash stays invisible. Add a snug wooden plug with a grain-matched top for a weatherproof, discreet key or note hideaway.
Live-edge desk cable wells
Drill from the underside of a live-edge slab to meet small top-side grommet holes, creating a hidden cable well that swallows power bricks and adapters. The large-diameter self-feed path acts as a pocket; line with felt and add a removable underside cover for access and airflow.
Log birdhouse condo
Use a log section and bore a central nesting cavity with smaller entrance holes at different heights for a multi-chamber birdhouse. The self-feed bit clears chips quickly; the extension helps reach deep without splitting. Add a rear clean-out hole with a hinged cover and mount it on a post.