Dremel 414-03 felt polishing wheel
Dremel 414 is a 1/2-inch felt wheel documented for the 401 mandrel.

How to choose
Choose the smaller felt face when you need access near an edge. Confirm you have the correct holder before ordering a loose wheel.
Compatibility and limits
1/2-inch loose felt wheels · six-piece offer for the 401 mandrel
Questions before buying
When should I move from the half-inch 414 to the one-inch 429?
Compare the larger felt wheel when an open surface gives it room. The 414 is easier to fit beside an edge. Both require the documented 401 interface.