Description: 10pcs 10mm-50mm Diamond Hole Saw Drill Bit Set Tile Ceramic Glass Porcelain Marble Hole Saw Specifications: Material: Steel Size: 10mm\/0.39", 14mm\/0.55", 16mm\/0.62", 18mm\/0.7", 20mm\/0.79", 26mm\/1.02", 32mm\/1.26", 38mm\/1.50", 45mm\/1.77", 50mm\/1.97" Quantity: 10pcs Features: Can be used with a standard electric drill. Always use lubrication (water), otherwise the diamond core drill will burn. Materials and only needs water for lubrication. This diamond coated core drill bit removes a complete circle from glass, marble, tiles,granite, ceramic or other. Use note: 1. Start your hole diagonally, make a round trace and then hold drill straight. 2. Always use lubrication (water), otherwise the diamond core drill will burn. Package Included: 1Set x Diamond Hole Saw (10pcs) More Details: