1-3/8" Diamond Dry Core Bits With Side Protection

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-5/8-11 thread fits on most polishers/ grinders;
-Very aggressive and long lasting due to the Vacuum Brazed Tech.;
-With vacuum brazed side protection;
-Wet use only;
-Recommender speed 3,500-4,500 RPM.

DAMO 1-3/8" Wet Core Drill Bit with side protection is designed for drilling the faucet-mounting holes in countertops and vanities. Utilizing the Vacuum Brazing Tech., it is very aggressive and can drill through the toughest 1-1/4" granite or engineered stone countertop. With the 40mm (1-3/5") width brazed side protection, it can smooth out the holes or enlarge the holes as a drum wheel. It can be used on granite, marble, porcelain, ceramic and concrete. The 5/8"-11 arbor fits on most drills and polishing tools in the marketplace today.

You may buy seperately our core bits adapter to use with the normal electric hand drills which take 3/8" shank.