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The CENTURY DRILL TOOL CO INC 22328 is a 7/16-inch general purpose drill bit designed for clean, fast drilling in wood, metal, and plastic. The 135-degree split-point tip is self-centering, eliminating the need for a center punch and reducing the pressure required to start a hole. The tip will not walk or wander on smooth or curved surfaces, which keeps holes accurately placed from the first contact. Ground flats on the shank provide a secure grip in both keyed and keyless chucks. This bit ships in a package of three, making it a practical choice for shop inventory or service van stock.
The 22328 is suited for general trades work where a reliable, multi-material bit is needed across everyday tasks. Electricians, plumbers, HVAC technicians, and general contractors commonly use this diameter for conduit, pipe, and bracket work. The 7/16-inch size is a common diameter for running fasteners, anchors, and through-holes in light-gauge steel, lumber, and thermoplastic panels. The three-count pack reduces trips to the supply house and keeps replacements on hand during production work.
Designed as a general purpose replacement or stock bit compatible with standard 3/8-inch and 1/2-inch keyed and keyless drill chucks accepting 7/16-inch diameter bits.
Installation is performed by any trade professional using a corded or cordless drill driver. Secure the bit fully into the chuck and tighten before operation. When drilling metal, use appropriate cutting fluid or lubricant to extend bit life and reduce heat buildup. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed.
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