100mm dry diamond core drill, M14 threaded connection, vacuum-welded hole saw for masonry, hollow drill for tiles, marble, granite, porcelain, concrete and quartz stone

Vacuum-welded diamond technology: more robust and wear-resistant than galvanized diamond drill bits; The diamond tile drill bit offers higher cutting speed, durability, and robustness. Superior performance: Experience efficient drilling with specially designed drill bits (18 mm diameter and larger) featuring holes on both sides to quickly remove stone chips and increase drilling efficiency. Wide application: Our diamond drill bits have been specially designed to achieve excellent drilling results in granite, marble, porcelain stoneware, tiles, ceramics, masonry, concrete, quartzite, natural stone tiles, and hard floor tiles. Efficient dry drilling: The tile drill bit has been specially designed for dry drilling, allowing you to work efficiently without the need for water or other coolants. Usage tips: Set the drill bit to a 45-degree angle, then gradually return it to a right angle by moving it slightly. back and forth; do not press too hard on the hole opener.