Premium Quality Diamond Tipped Drill Bits: This premium quality diamond tipped drill bit is made of stainless steel and coated with diamond particles to create a more durable and efficient drill head and work with a wide range of delicate materials. Diamond Coating Up to 10mm: This diamond tipped drill bit has a diamond coating up to 10mm, making it sharper than ordinary drill bits when drilling and the drilled hole is smoother, especially suitable for precision work on porcelain, glass, and ceramic tiles. Heat Dissipation Wax Core: Unlike standard diamond tipped drill bits used for ceramics and glass that require water or lubricant to keep them cool, our built-in wax core can automatically absorb and dissipate heat. Wide Application: This diamond tipped drill bit is perfect for drilling granite and marble, masonry, concrete, tile/ceramic, and hard plastic. Diamond tipped drill bits ideal for porcelain tile, granite, marble, stone, masonry, brick, etc. Material: Stainless steel and