Package Includes: 2 x 1 inch diamond hole saw, 25mm diamond-coated hole saw, suitable for drilling holes in glass, marble, pocelain, fiberglass, slate, light stone, ceramic tiles or granite Cutting Hole Diameter: 1" / 25mm; Cutting Depth: 1.1" / 28mm; 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. Specification:
Cutting Hole Diameter: 1" / 25mm
Cutting Depth: 1.1" / 28mm
Shank Diameter: 0.31" / 8mm
Shank Height: 1" / 25mm
High Quality Material: Iron alloy

Package Includes:
2 x 1 inch diamond hole saw

How to Cut Successfully:
1. Make a half-moon-shaped notch on the glass/tile/stone drill with 45 degrees.
2. Slowly raise the drill bit to 60 degrees, and then lightly drill.
3. Reach 90 degrees and continue drilling.
4. Finally, the glass/brick/stone is drilled. This technique requires the drill bit to "shake" instead of applying steady pressure all the time.

Warm Tips:
1. Please add water as coolant and drill slowly.
2. Start drilling the surface at an angle of 45 degrees and align 90 degrees when forming the hole.
3. Never use an electric drill when the machine is in a hammering state.
4. The hole does not need to be laborious, because the cutting is clean.