16-piece Hole Saw Set, Diamond Drill Bits 6-50 mm Glass Drilling Tools Kit for Carbon Steel, Glass, Ceramic, Porcelain, Tile, Marble

MATERIAL --- Using high-quality diamond, the drilling capacity is better, resulting in more precise drill holes. 16 DRILL BITS --- Comes with 16 drill bits of different sizes, including 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 35mm, 40mm, 45mm, and 50mm. WIDE APPLICATION --- Widely used in glass, ceramics, marble, and other hard, brittle materials. DURABLE --- The drill bits are made with a diamond coating, which is excellent for making precise and smooth holes in glass or any other hard, brittle material. NOTE --- By reducing the drilling speed and continuing to Add water cooling to extend the life of the drill bits (dry drilling is strictly prohibited). Contents: 1 set of 16 diamond drill bits