1¼” UNC (f) - 102mm Diameter - 250mm Barrel Length

Our premium diamond core drill bits are available with 1¼ UNC female fittings and 1½ BSP male fittings, ensuring compatibility with a range of professional drilling equipment. Specifically designed for very hard concrete, these core bits deliver fast and efficient cutting performance on quartz, river gravel, and flint, as well as hard natural stone. They are highly effective when working with high levels of steel reinforcement, making them ideal for demanding construction applications. Featuring a unique ‘Aero’ low-friction golf ball design, these core bits allow for greater water coverage at the cutting edge, ensuring faster slurry removal and improved cooling. Not recommended for dry cutting, these bits perform best with adequate water supply to maximize efficiency and longevity.