Diamond Core Drill Bits:Used to drill circular holes into ceramic tiles, porcelain, marble, granite, concrete walls, and floors. When drilling, it leaves a solid cylindrical core in the center (hence the name “core drill”).

Dry drilling: Suitable for thinner or brittle materials (like tiles and thin stone).

Wet drilling: Essential for thick concrete or large-diameter drilling. Must use water for cooling, otherwise, the high heat will instantly burn out the diamond layer on the drill tip.