Diamond Core Bits?High-quality, temperature-resistant diamond drill bits for efficient and clean drilling. Filled with cooling wax and suitable for dry drilling, no need to spend preparation time for additional cooling (such as wet drilling). Scientific Design?The scientific chip removal design makes the Dry Tile Drill more stable without making it dry and dusty. The shank of the diamond drill adopts a circular design widely used in hand drills and angle grinders. Diameter?Diamond Drill Bits Hole Opener has 7 different specifications, namely 5/6/8/10/12/14/16mm, which can meet your different needs. High Quality Material?The gold-plated tile diamond drill bit is made of high-quality gold sand steel, with wear resistance, durability and long service life. Diamond Dry Drill Bit is a practical tool in life, with high hardness and sharpness. Multi-Purpose?Professional diamond drill bits for drilling porcelain tiles, glass, hard ceramic tiles and slabs, porcelain tiles, granite marble,