Metallics BHD11 Bell Hanger Drill Bit Dia 3/8" 24" (1 pc)

The BHD11 is a 3/8 inch diameter bell hanger bit with a 24 inch overall length. That length is what lets you pass through a wall, sill plate, or stacked framing in one pass rather than drilling from both sides and trying to meet in the middle. The 3/8 inch hole suits pulling low voltage or communication cable through.

A bell hanger bit has a hole through the tip, so once you break through you can feed wire or a pull string into the eye and draw the cable back through the hole as you retract the bit. A standard auger makes the hole and nothing more, so you then need a fish tape or glow rod. For running phone, alarm, thermostat, or coax through a wall or floor plate, the bell hanger saves the second step.

Yes, with room to spare. A 2x4 wall with drywall both sides is roughly 4-1/2 inches through, and a bottom plate plus subfloor and a rim joist is well inside 24 inches of reach. The 24 inch length is aimed at exactly that drill-down-through-the-plate-from-inside-the-wall-cavity work, and at reaching into a cavity from an attic or crawl space.

It is a wood boring bit. Bell hanger bits like the BHD11 are made for wood framing, plates, and sills, and will also take light work in drywall and some soft composites. For brick, block, or concrete you want a carbide tipped masonry or SDS bit instead, not this one.

One bit per order, supplied in a pouch. If you are stocking a van or kitting out a crew, order one per installer rather than expecting a multi-pack.

A 3/8 inch bore handles a single coax, a Cat cable, or a pair of thermostat or alarm runs comfortably. If you are bundling three or more jackets, or pulling through a hole you also need fire caulk around, step up to a larger diameter bell hanger bit so you are not forcing the pull and stripping jacket.