FOCSTOL Diamond Core Drill Bit Set - 7pcs (6/8/20/35mm+10mm Finger Milling Bit+35mm Beveling Chamfer Bit+HEX) Diamond Hole Saw Kit for Porcelain

FOCSTOL Diamond Core Drill Bit Set - 7pcs (6/8/20/35mm+10mm Finger Milling Bit+35mm Beveling Chamfer Bit+HEX) Diamond Hole Saw Kit for Porcelain

Package Include-----Total 7pcs/set: 4pcs core drill bits 1/4''(6mm), 5/16''(8mm), 4/5''(20mm), 1-3/8''(35mm); 1pc 3/8''(10mm) finger milling bit; 1pc 1-3/8''(35mm) beveling chamfer bit; 1pc hex adapter Application-----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 adapter could change the connection of diamond bits High-quality Diamond-----High-quality base steel, high-quality diamond provides to improve the efficiency of hole drilling Vacuum Brazed-----Vacuum brazed technology provides higher processing efficiency and longer working life. Dry or Wet use. Wet using will prolong the working life and get better drilling effect Recommended Machine-----5/8''-11 Thread Angle Grinder. Recommended speed 6000RPM, maximum speed 11000RPM. If you want to use electric drill or other machine, you can use hex adapter in the package. (Use electric drill: Before starting drilling, please confirm your drill's RPM, at least over 2000RPM. Faster the RPM, longer the drill bit's working life)