Eighteen-inch bell hanger bit for fishing wire and cable through stud bays, joists, top plates, and sole plates without tearing open the wall. The cross hole near the tip lets the bit pull a wire back through the drilled path: stop with the cross hole exposed on the receiving side of the framing, hook your fish tape or directly thread the wire through the hole, then run the drill in reverse to draw the wire through as the bit retracts. High-speed steel with 118-degree split point starts accurately on cope-cut bottom plates and bores cleanly through dry framing lumber. Three-flat shank prevents chuck slippage at long-flute torque.

• 1/2" diameter, 18" overall length, three-flat 3/8" parallel shank
• Cross hole near tip for pulling wire back through drilled path
• High-speed steel, polished finish, heat-treated for repeated framing pulls
• 118-degree split point starts without skating on smooth plates
• Single-piece construction (no welded extension to fatigue and snap)

Selection Tip: 1/2" is the largest in the line -- 10 AWG or 8 AWG NM-B for dryer/range/water-heater circuits, larger bundled feeds, or pilot drilling ahead of 1/2" EMT conduit runs. Check NEC 300.4(A) hole-edge distances and protect with nail plates if the hole is closer than 1-1/4" to the stud edge -- 1/2" gets close on a standard 2x4.

Use Tip: Drill at a slight upward angle when boring through horizontal top or sole plates -- a 10-15 degree lead-in keeps the wire from kinking as it crosses the plate after the pull. Run a corded or 18V-and-up cordless drill; lower-voltage cordless platforms stall on the long flute and leave the bit hot. Back out every few inches on the first pass to clear chips, then run faster on the return pull. A rag of paste wax on the flutes makes pulls through dry pine noticeably easier.

Pull Technique: After drilling through to the receiving cavity, stop the trigger and back the bit out just far enough to expose the cross hole on the far side. Pass the wire or fish tape through the cross hole, secure with electrical tape, then run the drill in reverse to retract the bit while pulling the wire through in one motion. Saves a separate fish-tape pass and is the original reason bell hanger bits exist.

Care Tip: Pull straight out of the chuck when removing -- side-load on an 18" flute bends the shank near the chuck and the bit will wobble badly on the next use. Store hanging or in a tube; loose in a tool bag will bend any long bit eventually.

Note: HSS only -- not rated for nail-embedded framing or metal stud track. Step up to a nail-cutting bell hanger or auger if the path crosses old framing where finish nails or staples may be embedded in plates. For metal stud commercial framing, use a step bit or hole saw instead.

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• ⚠  WARNING: This product and the dust created by its use may contain chemicals including lead known to the State of California to cause cancer birth defects or other reproductive harm. For more information go to www.p65warnings.co.gov