Diamond Core Drill Bits Set 9pcs (6/6/8/20/25/35/50mm+35mm Beveling Chamfer Bit+Triangle Shank Adapter) Hole Saw Kit for Ceramic Tile Porcelain Marble Granite with M14 Thread SANLEETEK

【Specification】9pcs in total:7pcs 6/6/8/20/25/35/50mm M14 thread Drill Bits + 1pc 35mm Beveling Chamfer Bit + 1pc Triangle Shank Adapter 【Application】Widely use for dry or wet drilling/beveling/enlarging/shaping holes in ceramic tile porcelain marble granite, quartz 【High Performance】Advanced vacuum brazed technologuy and high-quality diamond grain imporve the performance and lifetime 【Features】The inside of 6-10mm drill bits are filled with cooling wax, keep the bits cool and lubricated for dry drilling. The design of the U-groove tooth shape above 20mm is sharper, facilitating the discharge of debris 【Recommended Machine】The bits are suitable for M14 thread angle grinder. Recommended speed 6000RPM, maximum speed 11000RPM. If you want to use electric drill or other machine, you can use Adapter in the package.Minimum RPM: 2000; Faster the RPM, Longer the Working Life