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The IRWIN INDUSTRIAL TOOL CO 3041021 is a Speedbor Max spade drill bit engineered for fast, clean wood boring in professional framing, rough-in, and remodel applications. At 1.5 inches in diameter and 6 inches in length, this bit is built for drilling through studs, joists, and structural lumber where electricians, plumbers, and HVAC technicians need to route conduit, pipe, or duct penetrations. The tri-flute design accelerates chip ejection to reduce heat buildup and keep cuts clean. Cutting spurs feature three cutting edges per spur for extended durability under heavy use. This package includes three bits.
The 3041021 is suited for residential and light commercial rough-in work where repeated boring through dimensional lumber is required. Electricians pulling wire through stud bays, plumbers running drain lines, and HVAC installers routing low-voltage or refrigerant line sets all rely on spade bits in this size range. The 6-inch length provides enough reach for standard 2x4 and 2x6 framing without requiring a bit extension in most scenarios. The full screw tip enables self-feeding to reduce downforce on the drill operator during production boring.
Compatible with all standard 1/4 inch quick-change chuck systems. The grooved hex shank also seats securely in conventional drill chucks and bit extensions.
Installation is performed by electricians, plumbers, and HVAC technicians during rough-in phases. Confirm the boring path is clear of existing wiring, pipe, and structural fasteners before drilling. Use eye protection and secure workpieces to prevent kickback when the bit breaks through the far face of a board. Follow applicable building codes when sizing penetrations for fire-blocking and sleeve requirements.
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