• Diamond hole saw with a 68 mm drilling diameter and 10 mm round shank. • Includes a center pilot drill bit for precise positioning that prevents deviation and reduces vibration. • Manufactured with high-quality alloy materials and brazing technology for greater thermal resistance. • Sintered diamond coating effectively reduces friction, heat, and cutting resistance. • U-shaped groove design and side holes allow for rapid chip removal and efficient cooling. • Compatible with a wide variety of hard materials such as porcelain, marble, granite, masonry, concrete, and glass. • Allows for both dry and wet drilling to achieve round, clean, and smooth holes.