4-Piece Set of Dry Diamond Drill Bits with Hex Shank, 6/8/10/12mm, Vacuum Brazed Hole Saw for Ceramic Tile, Marble, Granite

【COMPLETE SET】 The set includes 6/8/10/12 mm diamond drill bits. Drills of different sizes to meet your various needs. You can drill more precisely and easily. 【DURABLE AND EFFICIENT】 High-quality diamond grit for efficient and clean holes. Filled with cooling wax, extremely heat resistant, suitable for dry drilling. 【PERFECT COMPATIBILITY】 The 1/4 inch (6.35 mm) hex shank can be used with many well-known brands of ordinary cordless drills and screwdrivers. Primarily suitable for all common drill bits, drill chucks, and lightweight electric hammers from Bosch, Hilti, Metabo, Makita, Milwaukee, etc. 【HOW TO USE】 1. Pre-drill the holes with a gold carbide drill bit. (Please note: Carbide drill bits are for pre-drilling only, not for drilling the entire hole in hard materials.) 2. Insert one of the diamond drill bits and continue drilling. (A slight rotating motion while drilling can achieve a more ideal drilling effect.) 【WIDE APPLICATION】This drill bit set is ideal for hard materials such as porcelain, glass tiles, ceramics, ceramic tiles, granite, marble, quartz, limestone, fiberglass terrazzo, masonry, quartzite, and sandstone. The diamond drill bits are set with high-quality, temperature-resistant diamond grit. This allows for drilling hard materials such as hard granite or marble floor tiles. The 1/4-inch diameter hexagonal shank fits the drill chucks of all common drills as well as light impact drills from Bosch, Hilti, Metabo, Milwaukee, and many other manufacturers. Material: Carbide + Diamond. Hexagonal shank: 1/4" (6.35 mm). Drill bit diameter: 6/8/10/12 mm. Color: Black. Package: 4 diamond drill bits (6/8/10/12 mm). About the product: 1. What speed should I use? --- It is recommended to use a speed of at least 1500 RPM while drilling for ideal results. 2. Does it need to be cooled? --- Equipped with a cooling wax filling, no cooling is required. However, cooling it can increase the drill bit's lifespan. 3. Gold carbide drill bits --- For precise pre-drilling. This makes drilling easier with diamond-tipped drill bits.