CENYB M14 Diamond Drill Bits Set HHD90 for Granite Ceramic Marble Tile Stone Glass, 6 Pcs with Hex Shank Adaptor Vacuum Brazed Hole saws Kit (1/4”, 5/16”, 3/8”, 1-3/8", 1-3/4", 2") - MCDB1406651

• 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 5/8"(15mm) on the outside allows for better polishing of the edges after drilling to maximize utilization, which is both convenient and cost saving. Humanized Structure: This hole saw drill bit set adopts universal thread, suits for angle grinder. The design of U-shaped chip grooves provides longer working life, fast and smooth drilling. Wildly Use: Whether ceramic,tiles,porcelain tile,granite,marble,stone,masonry or brick,this kit is suitable for all these materials drilling. Package includes: 7Pcs of dry diamond core drill bits kit for drilling holes diameter of 1/4”(6mm), 5/16”(8mm), 3/8”(10mm), 1-3/8"(35mm), 1-3/4"(45mm), 2"(51mm), 9/16"-12 to 3/8" Hex Shank Adapter.