How many kinds of quick change discs you know?

Abrasive belt slitting machine

Cutting and grinding disc making machine

Yihong Abrasives fiberglass backing plate

Color grinding disc

Flap disc/cutting disc/grinding wheel oven machinery

X-lock fiberglass backing plate for Bosch sanding discs

Yihong abrasives flap wheel

Yihong abrasives zirconia flap disc