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

Wet diamond core drill bit 4 inch delivers fast, clean holes in concrete and brick while reducing heat buildup for smoother, longer drilling. Designed for wet coring, it helps lower friction and supports steady cutting on tough materials like reinforced concrete and masonry. The universal 1-1/4 in-7 internal thread mounts quickly to compatible hand drills or stand drills, making it a practical choice for HVAC, plumbing, and general construction hole-making.

• Fits 1-1/4 in-7 internal thread mounts for quick attachment to compatible hand drills and stand drills


• Delivers wet-drilling performance that reduces heat and friction for faster, more efficient coring


• Resists wobble with precision-ground teeth aligned to the installation axis for accurate holes


• Handles reinforced concrete, red brick, concrete, and foam brick for versatile jobsite use


• Supports durability with carbon steel body and laser-welded construction to help prevent segment detachment

Built for demanding installs and renovations, this wet coring bit is engineered to keep cuts smooth and edges clean, helping reduce rework when routing pipes, conduit, anchors, or AC pass-throughs. Use with water for best results to control dust and temperature during high-speed drilling. Whether you’re working on stair railings, masonry walls, or concrete slabs, this core bit offers a dependable balance of speed, control, and longevity. Grab yours today and prep your drill for the next concrete or brick opening.

• Diameter: 4 in / 102 mm


• Max drilling depth: 14 in / 356 mm


• Thread: 1-1/4 in-7 internal


• Application: Wet drilling


• Welding method: Laser welding


• Material: Carbon steel


• Compatible materials: Reinforced concrete, concrete, red brick, foam brick, masonry


• Compatible machines: Hand drills, stand drills


• Product dimensions: 16.22 x 4.02 x 4.02 in (412 x 102 x 102 mm)


• Net weight (incl. accessories): 5.4 lb / 2.45 kg