M14 Thread Vacuum Brazed Dry Diamond Drilling Core Bits Ceramic Tile Hole Saw Granite Marble Porcelain Brick Drill Bit Tools Feedback: Please confirm the receipt of the products after you got them. If you have any question about the products you received, please contact us in time and we will try our best to solve the problem and make you satisfied. Please give us positive feedback and 5-star Detailed Seller Ratings. Vacuum-brazed diamond core bits Features and specifications: Diameter 6, 8, 10, 12, 14, 16, 20, 25,28, 30, 35, 40, 45, 50, 55, 60, 65, 68, 75 mm Quantity:1 piece For electric drills, hand drills, angle grinders Application : Dry/wet drilling for porcelain tile, granite, marble, stone, masonry, brick and more Features: Fast and smooth drilling, long-lasting, chip-resistant, shatter-resistant, reduced thermal generation, better finish package included:1pcsdrill