Diamond Core Drill Bits Set - FOCSTOL 11pcs (6/6/8/20/25/28/32/35/50/65mm+50mm Beveling Chamfer Bit) Hole Saw Kit with Triangle Shank for Porcelain Tile Ceramic Granite Marble - F2-B42405L08

• Package Include-----Totally 11pcs/box: 10pcs core drill bits: Diameter 1/4''(6mm),5/16''(8mm),4/5''(20mm),1''(25mm),1-1/8''(28mm),1-1/4''(32mm),1-3/8''(35mm),2''(50mm),2-1/2''(65mm). 1pc 2''(50mm) beveling chamfer bit Application-----Diamond Core Drill Bits for drilling holes. Beveling chamfer bit are designed to shape, enlarge and round bevel existing holes in Porcelain Ceramic Tile Marble Granite, etc. Dry or Wet use. Wet using will prolong the working life and get better drilling effect Cooling Wax and U-grooves Design-----The inside of 6-10mm drill bits are filled with cooling wax, help heat dissipation and chip evacuation. 4pcs U-grooves above 20mm, good for heat dissipation and debris removal, with higher efficiency and better performance High Performance-----High-quality Diamond Grain and Vacuum Brazing Technology provides much longer working life, fast and smooth drlling, durable and sturdy Recommended Machine-----Corded Drill, Cordless Drill, Benchtop Drill. Use electric hand drill: Recommended speed not less than 2000RPM. Faster the RPM, longer the drill bit's working life. When use Angle Grinder, please install angle grinder drill chuck