Features: *1. It has strong toughness and wear resistance. *2. Incision resistance are small, increase the opening speed, long service life. *3. Industrial grade Coated Carbide Point with 4 Cutting edges. *4. Can be installed in the hand drill, electric drill, bench drill. *5. Suitable for Ceramics, granite, tiles, stone, wood, plastic,concrete wall to drilling hole. *6. Note: When drilling continuously, add water for cooling to avoid burnout of the drill bit. For example: ceramic tile, concrete, vitrified tile, glass, plastic steel, marble, etc. Specifications: Material: Carbide Alloy Bit Type: Tile and Glass Drill Bit Coated: Titanium Drill diameter: 6mm Package Includes: 4 PCS Drill Bit Note: 1. Conversion:1inch=2.54cm, 1cm=0.393inches 2. Please allow a bit error due to manual measurement. please make sure you do not mind before you bid. 3. The color may have different as the difference display, pls understand.