9Pcs Dry Diamond Core Drill Bits Set 1/4",1/4",1",1-3/8",2",2-1/2" Drill Bit+2" Beveling Chamfer Bit+2 Adapter) For Ceramic,Tile,Marble,Porcelain For

[Package Content] 6PCs Drill Bit:Diameter 1/4",1/4",1",1-3/8",2",2-1/2"(6/6/25/35/50/65mm) with 5/8-11 thread, 1PC Diamond Beveling Chamfer Bit:2"(50mm)with 5/8-11 thread, Adapters:1pc 5/8-11 Thread to SDS Plus Shank and 1pc 5/8-11 thread to Triangle Shank. In a Useful Box to Keep them Together and Easy to Find. Suitable for dry/wet drilling Porcelain Ceramic Tile Marble Granite, etc. Diamond core drill bits for drilling holes. Beveling chamfer bit and finger milling bit for shape, enlarge and round bevel existing holes. Hex or SDS adapter could change the connection of diamond bits from 5/8''-11 thread to hex or sds[High Durable & Efficiency] High-quality diamond grains and vacuum brazed technology provides high efficient working performance/Faster Drilling Speed/Longer Service Life. Treated by special high-temperature resistant process, can be used directly dry drilling,also with water to extend service life.[High Precision & Clean Cuts] U-Grooves design fast chip removal, high-temperature resistant process allowing for greater accuracy in drilling and englarge/beveling/shaping existing holes.[More Versatility & Convenience] With a diamond drill bit set, you have a Range of sizes and types to tackle different projects and materials,save money.[Recommended Machine] Angle grinder with 5/8-11 thread, Recommended Speed 6000RPM; Triangle Adapter for electric drill, recommended speed 2000-5000RPM; Faster the RPM, longer the bit's working life; Hammer drill,you can use SDS Adapter but have to shut down hommer moder when using these bits;Diamond