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The IRWIN INDUSTRIAL TOOL CO 63905 is a 5/64-inch titanium nitride-coated jobber length drill bit engineered for metal drilling applications. The titanium nitride coating bonds to the high-speed steel substrate to extend cutting life beyond that of uncoated bits. A heavy-duty web design runs through the body of the bit, delivering extreme rigidity under lateral load during metal penetration. The 35-degree split point geometry reduces feed pressure at the tip, allowing the bit to start on contact without work hardening the surrounding material. Licensed electricians, pipefitters, ironworkers, and general contractors reach for this bit when drilling into high-tensile-strength stock.
This drill bit is suited for use on ferrous and non-ferrous metals in both residential and light commercial jobsite conditions. The shorter cutting lips reduce torque demand when working through harder alloys, which helps protect both the bit and the drive tool. Sold in a pack of 3, this SKU is a practical choice for service professionals who keep spares on the truck or in the shop toolbox.
Designed for use in standard drill chucks accepting 5/64-inch round-shank jobber length bits, compatible with corded drills, cordless drill-drivers, and drill presses used in metal fabrication and general trade work.
Secure the bit fully in the chuck before applying power. When drilling metal, use cutting fluid or a suitable lubricant to manage heat buildup and prolong coating life. Apply steady, consistent feed pressure and allow the split point to self-center before increasing speed. Inspect the cutting edges between holes when working through hardened stock, and replace the bit if tip geometry shows visible wear.
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