10PCs Diamond Core Drill Bits Set,1/4",5/16",4/5",1",1-3/8",2" Drill Bits & 1-3/8" Beveling Chamfer Bit & 3/8" Finger Milling Bit & 2PCs Adapter for Ceramic Tile Marble Porcelain, Drill Tile Bit

10PCs Diamond Core Drill Bits Set ,1/4",5/16",4/5",1",1-3/8",2" Drill Bits & 1-3/8" Beveling Chamfer Bit & 3/8" Finger Milling Bit & 2PCs Adapter for Ceramic Tile Marble Porcelain, Drill Tile Bit

• 【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
• 【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
• 【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
• 【Recommended Machine】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
• 【Package Content】 6PCs Drill Bit:Diameter 1/4"(6mm),5/16"(8mm),4/5"(20mm),1"(25mm),1-3/8"(35mm),2"(50mm) with 5/8-11 thread. 1PC Diamond Milling bit 3/8"(10mm) with 5/8-11 thread. 1PC Diamond Beveling Chamfer Bit:1-3/8"(35mm)with 5/8-11 thread. 2PCs 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