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The Milwaukee Electric Tool Corp 48-13-7125 is a bell hanger drill bit designed for boring through wood framing and structural members to route low-voltage wiring, speaker cable, alarm wire, and similar conductors. At 1/4 inch in diameter and 12 inches in length, this bit provides the reach needed to penetrate standard wall plates, top plates, and stud bays without requiring an extension. Electricians, alarm installers, AV technicians, and low-voltage contractors rely on bell hanger bits like this one to maintain clean, code-appropriate wire runs through framing. This SKU is sold as a package of 6 individual bits.
Bell hanger bits are a standard tool on residential and light commercial rough-in jobs where wire must be fished through wood framing. The 12-inch length is suited for single-stud-bay penetrations and shallow top-plate runs. The 1/4-inch diameter accommodates common low-voltage conductors including thermostat wire, Cat cable, speaker wire, and alarm cable. A package quantity of 6 makes this well suited for service vehicles and job-site stock where bits are subject to regular replacement.
Designed as a standard bell hanger drill bit compatible with 3/8-inch and 1/2-inch chuck drills and right-angle drill attachments commonly used in low-voltage and electrical rough-in work.
Bell hanger bits are typically installed by licensed electricians, low-voltage technicians, or alarm and AV contractors during rough-in framing stages. Always ensure power is de-energized in any cavity being drilled near existing wiring before beginning work. When boring near structural members, follow local building codes regarding minimum edge distances to protect the bit and maintain structural integrity. Bits should be inspected for wear or tip damage before each use and replaced when dulled to avoid walking or wandering in the material.
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