Wet Diamond Core Drill Bit 5 in, 1-1/4 in-7 Thread

5 inch wet diamond core drill bit delivers fast, clean holes in reinforced concrete and masonry with reduced heat buildup for steadier cutting and longer service life. Designed for wet drilling, it lowers friction to help maintain speed while protecting the diamond segment bond. The universal 1-1/4 in-7 internal thread mounts quickly to common hand drills and stand drills for jobsite-ready versatility.

• Fits standard hand drills and drill stands with a 1-1/4 in-7 internal thread for quick setup.


• Delivers smoother, burr-reduced edges with precision-ground teeth for cleaner pass-through holes.


• Reduces heat and drag in wet-cut applications to support faster drilling and stable performance.


• Resists segment loss with laser-welded construction and high-hardness carbon steel body.


• Handles reinforced concrete, red brick, concrete, and foam brick for HVAC, plumbing, railing, and general construction.

Built for demanding coring tasks, this wet diamond coring bit helps you drill accurately without excessive wobble—thanks to a tooth center designed to stay aligned with the rotation axis. Use water during cutting to manage heat and keep debris moving for consistent results in concrete and brickwork. Whether you’re running conduit, installing AC lines, or opening service penetrations, this bit is ready for heavy-duty work. Grab yours today and keep your next core drilling job moving.

• Diameter: 5 in / 127 mm


• Max drilling depth: 14 in / 356 mm


• Thread: 1-1/4 in-7 internal


• Application: Wet drilling (wet/dry listed; wet recommended)


• Welding method: Laser welding


• Material: Carbon steel body with diamond segment


• Compatible materials: Reinforced concrete, concrete, red bricks, foam bricks


• Compatible machines: Hand drills, stand drills


• Net weight (incl. accessories): 7.41 lb / 3.36 kg


• Product dimensions: 16.22 x 5.00 x 5.00 in (412 x 127 x 127 mm)