【Diamond Drill Bits】These Diamond drill bits are made of upgraded carbon steel with smooth nickel plating surface to resist corrosion, sharp and durable without edge collapse. 【Premium Quality】Hollow Core Drill Bit Set Coated with high quality diamond to improve drill efficiency and creates a sharp, high precision and smooth cut. 【Diamond Hole Saw 15 Sizes】 1/4", 5/16", 3/8", 1/2", 9/16", 5/8", 11/16", 4/5", 7/8", 1", 1-10", 1-1/5", 1-3/8", 1-3/5", 2", to meet various drill needs. 【Versatile Uses】Glass drill bits are used to drill Glass Ceramic Bottles Pots Porcelain Marble Granite Stone. 【Tips】Please keep adding water when drilling to extend the life.Besides the water lubrication will improve the drilling experience. Diamond drill bits set, 15 PCS glass drill bits, diamond hole saw set for ceramic tile porcelain marble granite stone bottles. These diamond drill bits set can help you remove a complete hole from glass ceramic tile bottles marble porcelain and granite stone. Here we demonstrate our premium tile hole saw for you! Product Material： These diamond hole saw made of high-speed carbon steel that is durable and have a long sevice life,which are high quality and good performance for making clean and accurate hole. Widely Applications: These Hollow Core Drill Bit Set perfect for drilling glass tile porcelain granite bottles ceramic marble and other hard surfaces etc. 15 Sizes Includes 1/4" 5/16" 3/8" 1/2" 9/16", 5/8", 11/16" 3/4" 7/8" 1" 1-10" 1-1/5" 1-3/8" 1-3/5" 2", Different sizes glass hole saw to meet you various demands! Large Clearance Hole These ceramic drill bits are design with large clearance hole facilitate the entrance of cooling water and escape of chips. Making the drilling process more easy and relax. Package Includes: 15 PCP tile drill bit for bottles