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The IMPORT BDNA--22444-1 is a jobber-length twist drill bit designed for general-purpose drilling in metal, wood, and plastic. It measures 23/64 inch (0.3594 inch decimal) in diameter with an overall length of 4-7/8 inches and a flute length of 3-1/2 inches. The bit is manufactured from high speed steel (HSS) with an oxide/gold coating that improves surface hardness and reduces friction during cutting. A 118-degree split point initiates on contact without a center punch and resists walking on flat surfaces. The straight-cylindrical shank seats securely in standard 3-jaw drill chucks. This bit is sold individually and suited for HVAC, plumbing, and electrical rough-in work where precise hole sizing in sheet metal or framing members is required.
This drill bit is a general-purpose tool used across residential and light commercial trade applications. HVAC technicians reach for this size when drilling through sheet metal panels, equipment cabinets, and ductwork flanges. Plumbers and electricians use it for framing penetrations and conduit anchor holes. The 23/64 inch diameter is a common pre-drill size for tapping threads and for clearance holes on standard fasteners. The right-hand spiral flute clears chips efficiently in both hand-held and drill-press setups.
Designed as a general-purpose jobber-length drill bit compatible with any standard 3-jaw drill chuck accepting a 23/64 inch straight-cylindrical shank, including hand drills, cordless drills, and drill presses.
This bit is installed and removed by a licensed or experienced tradesperson using a standard keyed or keyless 3-jaw chuck. Secure the shank fully in the chuck before operation to prevent slippage. When drilling metal, use appropriate cutting fluid to extend bit life and reduce heat. Wear eye protection at all times and clamp workpieces securely to prevent spinning.
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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