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The IRWIN 49910 is a 5/8-inch I-100 series auger bit designed for boring clean, accurate holes through wood framing, timber, and rough lumber. Auger bits are used in hand braces and compatible low-speed electric drills where a controlled, chip-clearing cut is required. At 0.25 pounds, the 49910 is a lightweight single tool that delivers the screw-tip feed and spiral flute action characteristic of the I-100 pattern. Electricians, plumbers, and carpenters reach for auger bits when drilling through studs, joists, and plates to route conduit, pipe, or cable in rough-in work.
The 49910 is suited for residential and light commercial rough framing applications. It is a practical choice for drilling through dimensional lumber, engineered wood, and timber in new construction and retrofit installs. Plumbers drilling for supply or drain lines, electricians boring for conduit runs, and HVAC techs routing refrigerant or condensate lines through framing members are the primary users of this tool. It is sold as a single unit.
Designed for use in standard hand braces and low-speed electric drills that accept auger-pattern bits with a tapered square tang.
Auger bits are installed and serviced by carpenters, electricians, plumbers, and HVAC technicians performing rough-in drilling. Ensure the drill or brace is fully stopped before changing bits. When drilling near structural members, follow applicable building codes for notching and boring limitations in load-bearing framing. Keep the bit clean and lightly oiled when storing to prevent corrosion on the flute surfaces.
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