This center spindle adapter allows you to assemble radial bristle discs for use on a tapered spindle. For use with a 3/8" center hole.
Attach bristle disks and screw two adapter pieces together. Twist onto polishing motor spindle. 1 set (2 pieces)
Here's a quick video to explain how to set it up https://youtu.be/ta5wJexS9-s