TOP-VIGOR 85mm Diamond Drill Bit Glass Hole Saw Set, Hollow Core Drill Bit with Spotting Drill Bit, Tile Hole Cutter Set Core Drill Bits Center Pilot for Ceramics Porcelain Tile Bottles Pots Brick

• Rustless & Durable: Made of high strength Carbon Steel with smooth nickel plating surface to extend the service life, which are high quality and good performance that excellent for making clean and accurate hole.
• Quick, Sharp & Smooth Cut: Coated with high quality Diamond to enhance the drilling speed and creates a sharp, high precision and smooth cut with no broken edges In Seconds.
• Application: Drill Glass, Tile Bottles, Blocks Jars, Fiberglass Porcelain Tile Ceramic, Slate Mable, Granite Light Stone. Will work with electric drill and impact drill.
• Attention: Please keep the speed in 800-1000 per minute, keep adding water to keep the drill cool, strictly prohibit from dry drilling.
• Clearance Hole: Diamond drill bits along with clearance hole facilitate the entrance of cooling water and escape of chips from drilling. Makes drilling process easier.

Features: Good performance:diamond dust coating offers superior performance and cutting strength. Wide application of the Tile Hole Saw: coated core drill bit removes a complete circle from glass, tiles, marble, granite, ceramic or other materials and only needs water for lubrication. Specifications: Material: high quality steel, diamond dust coating Color: Silver Size: 85mm Drill depth: 35mm depth Total Length: 70mm Package Included: 3 pcs ( 1x Tile Hole Saw+1x Center Drill+1 L-type Wrench) Note: Electroplated diamond coating will wear off if the tool gets too hot. Never let your drill bit run dry. Please add water for coolant and drill slowly. start drill at 45 Degree to surface and align to 90 Degree as hole forms. Never use drills while machine is in hammer action. Holes Require No Further Work As Cutting Is Clean.