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The BSC PREFERRED QJDIB-DB-031 is a 7/16-inch black oxide drill bit precision-ground from high-speed steel for reliable general-purpose drilling. The 135-degree split point eliminates bit walking at startup, allowing accurate hole placement without a center punch. The black oxide coating provides corrosion resistance and helps reduce friction during drilling. A reinforced core improves resistance to breakage under load. Licensed trades and maintenance technicians reach for this bit when working through angle iron, wood, PVC, and similar materials in day-to-day service work.
This drill bit suits residential and light commercial applications where a dependable, general-purpose bit is needed across mixed materials. It is equally at home in a plumber's or electrician's bag for drilling pilot holes, running conduit through framing, or boring mounting points on bracket stock. The 7/16-inch diameter covers a common size range for fastener clearance and anchor prep work on the job site.
Designed as a general-purpose replacement drill bit compatible with standard 3-jaw drill chucks accepting 7/16-inch shank sizes across corded and cordless drill drivers used in trade applications.
Install into a properly sized drill chuck and tighten securely before use. Ensure the workpiece is clamped or secured to prevent movement during drilling. Use appropriate eye protection per applicable job-site safety requirements. Allow the bit to cool between extended drilling operations to preserve temper and cutting-edge life.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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