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: