16pcs 6?50mm Diamond Hole Saw Tile Drill Bit Ceramic Glass Coated Marble Tool

Features: 1. Our drill bit made from premium metal, which is of high hardness, wear?resistant and durable in use 2. Easy to use, just start your hole diagonally and make a round trace and then hold drill straight 3. Excellent for making tide and accurate hole on glass , tile and marble 4. Works better with a electric drill (Excluding in this item). 5. By reducing the drilling rate, and continue to add water cooling to extend the life of drill bits. Specifications: Material: Metal Size: 6 8 10 12 14 16 18 20 22 25 28 30 35 40 45 50mm Package Includes: 1 x 16pcs Diamond tool drill bit hole saw set Note: When using the bit please add water to cool down the temperature to extend its service life. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. .Our drill bit made from premium metal, which is of high hardness, wear?resistant and durable in use Easy to use, just start your hole diagonally and make a round trace and then hold drill straight. Excellent for making tide and accurate hole on glass , tile and marble Works better with a electric drill (Excluding in this item). By reducing the drilling rate, and continue to add water cooling to extend the life of drill bits.