Hello robyn, thank you for your question. The RYOBI Metal Buffing Kit (7-Piece) works best with a full size drill/driver. - Justin
Hi Patrick. You run the pad and let the motion and heat from the motion do the job. Thanks for asking. Greg
Hi Patrick. The screw thread is 1/4-20. Hope this helps. Greg
Hello Travis, Thanks for your question. These are meant to be used on a drill, not a bench grinder.
Hi Wannaknow, (1) 2-1/4 in. cushion sewn buffing wheel, (1) 3 in. cushion sewn buffing wheel, (1) 4 in. cushion sewn buffing wheel. Thanks for asking. Greg