Package Includes: 1 x 1-3/8 inch diamond hole saw, 35mm diamond-coated hole saw, suitable for drilling holes in glass, marble, pocelain, fiberglass, slate, light stone, ceramic tiles or granite. Cutting Hole Diameter: 1-3/8"/35mm, Cutting Depth: 1.18"/30mm, Shank Diameter: 0.31"/8mm, Shank Height: 1"/25mm. High-Performance Materials: The glass hole cutter is made of high-quality iron alloy, which is very sturdy and durable. At the same time, the surface is nickel-plated, which has good rust resistance, corrosion resistance and prolonged service life. Efficient & Smooth Cutting: The high-quality diamond drill bits with thicker diamond coating make the edge of the groove sharper, which can achieve smooth and high-precision cutting. Large chip holes on the side can remove waste, ensuring smooth and accurate punching. Wide Application: Widely used for drilling holes on the surface of porcelain, fiberglass, glass, ceramic, marble, stone and etc.