Hello and welcome to our store. We hope our service can satisfy you and wish you have a pleasant shopping experience! 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. 5. Suitable for Ceramics, granite, tiles, stone, wood, plastic,concrete wall to drilling hole. Specifications: Condition: High quality Type: Drill bit set Material: Carbide Shank type: Hex shank Color: As shown Diameter: 4mm / 5mm / 6mm / 8mm / 10mm / 12mm Shank diameter: 6.35mm QTY: 6Pcs Package includes: 6Pcs x Drill bits Notes: 1. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. 2. Please allow some slight dimension difference due to different manual measurement. Thanks for your understanding.