4-1/8" (105mm) Diamond Hole Saw with 2 Pilot Drills

Cutting diameter: 105mm | 4-1/8"; Shank Diameter: 10mm | 3/8"; Hole Saw Depth: 35mm | 1-3/8" The drill bit is brazed with diamond grains, which are distributed to provide a fast and smooth drill, ensuring a service life Each hole saw comes with two pilot drills: 1 x diamond tip pilot drill; 1 x center pilot drill. No special guide tools are required This diamond hole saw fits standard 3/8" chucks for standard drills. Perfect for porcelain tiles, glass, ceramic, marble, granite, light stone, fiberglass, etc. Note: Cannot be used for metal 1. Install the pilot drill bit for positioning. 2. Remove the pilot drill and continue drilling with a rotation. 3. You will get a hole with a smooth interior. Note: You need to add water or coolant during the drilling process to ensure the quality of the hole and extend the service life of the hole saw After each cut, it is essential to remove debris inside the hole saw. If two pieces of debris accumulate, they will block the hole saw, making it impossible to remove