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The PRECISION TWIST DRILL 010030 is a high-speed steel jobber-series drill bit built for drilling hard surfaces in demanding trade and industrial applications. With a 15/32-inch tip diameter and a 4-inch depth of cut, this bit handles through-holes in ferrous metals, structural steel, cast iron, and similar hard materials. The HSS construction resists heat buildup generated during high-speed drilling, helping the cutting edge retain hardness longer than standard carbon-steel bits. Licensed electricians, pipefitters, ironworkers, and general contractors reach for jobber-series bits like this one when drilling conduit knockouts, pipe penetrations, and structural connections.
This bit is suited for use in both residential and commercial construction environments where hard-surface drilling is a routine task. The 5-3/4-inch overall length places it in standard jobber-length range, making it compatible with most benchtop drill presses, magnetic drills, and handheld corded or cordless drills equipped with a standard keyed or keyless chuck. It is sold as a single unit and is appropriate for any trade requiring repeated, reliable hole-making in tough base materials.
Designed as a standard jobber-length HSS drill bit compatible with any drill press, magnetic drill, or handheld drill driver fitted with a chuck accepting up to 1/2-inch shank tooling.
This bit is installed and used by licensed tradespeople and experienced operators performing metal drilling tasks. Secure the workpiece firmly before drilling and use appropriate cutting fluid on ferrous metals to extend bit life and reduce heat buildup. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed. Always wear appropriate PPE including eye protection when drilling metal.
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