Diamond Core Drill Bits Set - FOCSTOL 11pcs (6/6/8/10/20/25/32/35/45/50/65mm) Hole Saw Kit with Triangle Shank for Porcelain Tile Ceramic Granite Marble

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  • 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
  • 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
  • High Performance High-quality Diamond Grain and Vacuum Brazing Technology provides much longer working life, fast and smooth drlling, durable and sturdy

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