Diamond Core Drill Bits Set 9pcs (20/25/35/50/68/110mm+20mm Finger Bit+50mm Beveling Chamfer Bit+Hex Adapter) Hole Saw Kit for Ceramic Tile Porcelain Marble Granite with M14 Thread SANLEETEK

【Specification】9pcs in total:6pcs 20/25/35/50/68/110mm Drill Bits+1pc 20mm Finger Bit+1pc 50mm Beveling Chamfer Bit+1pc Hex Shank Adapter 【Application】Widely use for dry drilling/beveling/enlarging/shaping holes in ceramic tile porcelain marble granite, quartz 【High Performance】Vacuum Brazed technology provides high efficient working performance, faster drilling speed and longer service life 【Unique Detail】The design of the U-groove tooth shape above 20mm is sharper, facilitating the discharge of debris 【Recommended Machine】Suitable for M14 thread angle grinder. Recommended speed 6000RPM, maximum speed 11000RPM (Diameter>100mm, Recommended speed 3000RPM, maximum speed 6000RPM). 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