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The L H Dottie Co HS20C is a 5/16-inch high speed steel drill bit designed for drilling through metal, wood, and other common trade materials. High speed steel construction provides the hardness and heat resistance needed for sustained use in demanding job-site conditions. This bit is sold individually and fits standard drill chucks used by electricians, plumbers, HVAC technicians, and general trade contractors during rough-in and installation work.
The HS20C is suited for residential and light commercial applications where a reliable, single-unit drill bit is needed for conduit entry points, pipe penetrations, bracket mounting, and similar tasks. Its 5/16-inch diameter is a commonly required size for through-holes accommodating fasteners, anchors, and small-diameter conduit or tubing work.
Designed as a general-purpose replacement or supplemental drill bit for use with standard keyed and keyless drill chucks in corded and cordless drills common to trade applications.
Installation of this drill bit should be performed by qualified trade professionals following applicable job-site safety procedures. Ensure the drill is powered off and the chuck is fully tightened before beginning operation. Use appropriate cutting speed for the material being drilled, and wear eye protection at all times when drilling.
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