Bestlink Factory Price 8mm Shank Grinding Cups Button Bit Grinder and Boroc for grind bit steel. To get the best grinding effect, you should use the No. 1 quality grinding cups(grinding pins) made by BESTLINK company.
BESTLINK makes and supplies 4 models of grinding cups(grinding pins) as below:
Our factory specializing in producing diamond Button Bits grinding cups / grinding pin. It's a perfect tool for grinding your broken or worn button bits, to prolong it's lifespan.