General description These Hole Saws are designed for precision drilling in hard and brittle materials such as glass, ceramics, and marble. Made from high-quality diamond, they ensure better drilling capacity and more accurate holes. Technical specifications Material: Diamond coating Sizes included: 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 35mm, 40mm, 45mm, 50mm Usage These drill bits are ideal for creating precise and smooth holes in various hard materials. It is recommended to reduce drilling speed and use water cooling to extend the life of the drill bits, as dry drilling is strictly prohibited. Other information Contents: 1 set of 16 diamond drill bits