Diamond Core Drill Bit 114mm, 356mm Depth, 1-1/4 In-7

4-1/2 inch wet diamond core drill bit delivers fast, clean holes in reinforced concrete and masonry while reducing heat for longer segment life. Built with laser-welded diamond segments and a carbon-steel body, it’s designed for stable, high-speed coring with less wobble. The universal 1-1/4 in-7 internal thread connects quickly to many hand drills and stand drills for common construction and installation work.

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


• Delivers wet-drilling performance that lowers heat buildup, reduces friction, and improves drilling speed


• Resists segment loss with laser welding and a carbon-steel body engineered for high-speed coring


• Cuts clean, accurate holes with precision-ground teeth for smooth, burr-reduced edges


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

When your job needs consistent cores without excessive vibration, this wet coring bit is built to stay aligned and keep moving through dense materials. Use water feed where possible to help control dust, cool the bit, and support steady progress on deeper holes. Ideal for site work like air-conditioning lines, pipe runs, anchors, and retrofit installs in concrete and brick. Grab yours today and keep a reliable core bit ready for the next drill-out.

• Bit diameter: 4-1/2 in (114 mm)


• Max drilling depth: 14 in (356 mm)


• Overall dimensions: 16.22 x 4.49 x 4.49 in (412 x 114 x 114 mm)


• Thread: 1-1/4 in-7 internal


• Welding method: Laser welding


• Application: Wet drilling


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


• Compatible machines: Hand drills, stand drills


• Net weight (incl. accessories): 6.26 lb (2.84 kg)


• Body material: Carbon steel


• Hardness: 95 HRB