CENYB Diamond Core Drill Bits Set for Granite Ceramic Marble Tile Stone Glass Procelain, 6 PCS Hex Shank Vacuum Brazed Hole saws Kit(1/4” X2, 5/16” X2, 3/8”, 1/2”) - MCDB066512T

• High Quality Hole Drilling: Made of high quality diamond and steel by vacuum brazed diamond technology.provide very high efficiency,drilling faster,durable and sturdy. Convenient And Cost Saving: Brazing coating of up to 3/8"(10mm) on the outside allows for better polishing of the edges after drilling to maximize utilization, which is both convenient and cost saving. Dry Drilling Design: Diamond drill bit made of carbide and integrated with wax lubricant inside, which can melt while dry drilling and cool the cutting surface. Water can be used as additional cooling to prolong the life of the bit. Wildly Use: Whether ceramic,tiles,porcelain tile,granite,marble,stone,masonry or brick,this kit is suitable for all these materials drilling. Package Includes: 6 Pieces of diamond core drill bits kit for drilling holes diameter of 1/4" (6.5mm)X2, 5/16" (8mm)X2, 3/8"(9.5mm), 1/2" (12.7mm), Hex Shank Adapter.