Amazon.com: YUFUTOL SA-3 Tungsten Carbide Burr
SA-5 Tungsten Carbide Burr Rotary File Cylindrical Shape Double Cut for Die Grinder Drill Bits 1/4'' Inch Diameter of Shank and 1/2'' Inch Diameter of Cutter 1'' Inch Cutter Length 4.7 out of 5 stars 144
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