$16.50
3/32" shank (will fit most handpieces including quickchange style)
Unscrew the top and attach assorted unmounted wheels and buffs like bristle wheels and felt buffs.
Reinforced screw mandrels have a thicker top portion to resist bending the shaft, which can ruin the mandrel. They cost a little more, but they bend a lot less than their skinny cousins!
Buy by the dozen so that you don’t have to keep changing the attached polishing wheels or buffs.
Sold by the dozen.