Diamond Core Drill Bit 108mm Wet-Dry, 5/8-11 Thread

Diamond core drill bit delivers clean, accurate 108mm holes in brick, block, and concrete with a wet/dry design that adapts to your jobsite setup. Built with a diamond-grit cutting head and carbon steel body, it’s made to stay stable under load and keep cutting efficiently. The universal 5/8"-11 inner thread fits many handheld drills and core drilling rigs, while laser welding helps reduce segment loss during demanding masonry drilling.

• Fits standard tools with a universal 5/8"-11 inner thread for quick mounting on compatible drills and core rigs.


• Delivers wet or dry drilling flexibility—run dry for speed or add water to reduce dust and heat.


• Includes a pilot bit adapter to help start straight and minimize bit walking on hard surfaces.


• Includes an 80mm diamond saw blade for extra cutting tasks without separate add-ons.


• Resists wear with diamond-grit head, carbon steel body, and laser-welded construction for stable cutting.

From HVAC and plumbing pass-throughs to railing, conduit, and general construction work, this wet/dry diamond core bit is built for repeatable results in tough masonry materials. Use it on red brick, concrete, foam brick, and similar substrates when you need a consistent hole size and controlled entry. Set up with the pilot for accurate positioning, choose wet or dry operation based on site conditions, and keep projects moving with fewer tool changes. Grab yours today and drill with more control.

• Bit diameter: 108mm (4.25 in)


• Maximum core depth: 241.3mm (9.5 in)


• Thread: 5/8"-11 inner thread


• Welding method: Laser welding


• Compatible machines: Handheld drills, core drilling equipment


• Included accessory: 80mm (3.15 in) diamond saw blade


• Net weight (with accessories): 2.2kg (4.9 lb)


• Product size: 290 × 108 × 108mm (11.4 × 4.3 × 4.3 in)


• Cutting materials: Red brick, concrete, foam brick, masonry