Wet Diamond Core Drill Bit 3-1/2 in, 1-1/4-7, 14 in

Diamond core drill bit delivers clean, fast wet coring through reinforced concrete and masonry with reduced heat for longer bit life. The 3-1/2 in (89 mm) diameter and laser-welded segments are built for stable, accurate drilling with less wobble, helping you cut smooth openings for HVAC, plumbing, railings, and general construction. Universal 1-1/4 in-7 internal thread fits common hand drills and drill stands.

• Fits 1-1/4 in-7 internal thread for quick mounting on standard hand drills or drill stands


• Delivers wet drilling performance that lowers heat and friction for steadier, faster coring


• Resists segment loss with laser welding and high-precision construction for demanding materials


• Cuts cleanly with precision-ground teeth to help produce smooth, burr-reduced edges


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

Choose this wet diamond coring bit when you need reliable openings without constant rework or overheating downtime. The stable, centered tooth design supports accurate alignment during high-speed rotation, making it easier to keep your bore on target in dense aggregate and brickwork. Ideal for contractors and installers who drill repeatedly for lines, sleeves, anchors, and pass-throughs. Match the thread, use wet cutting where possible, and keep the core clear for consistent results. Grab yours today.

• Diameter: 3-1/2 in / 89 mm


• Max drilling depth: 14 in / 356 mm


• Thread: 1-1/4 in-7 internal


• Welding method: Laser welding


• Material: Carbon steel body


• Compatible machines: Hand drills, stand drills


• Product dimensions: 16.22 x 3.50 x 3.50 in (412 x 89 x 89 mm)


• Net weight (incl. accessories): 4.5 lb / 2.04 kg


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