3M™ Perfect-It™ quick connect adapter makes it easy to connect or disconnect double-sided buffing pads on rotary polishers. Our heavy-duty adapter saves both time and effort in an automotive body shop by making pad changes so quick and simple. 5/8 in thread. 3M™ quick connect adapter allows for quicker changing of buffing pads on rotary polishers, which is particularly helpful when changing between compound and polishing pads, With the adapter's sliding ring, you can easily attach or a pad in seconds. But when the locking system is engaged, the adapter provides a reliable connection between the pad and polisher to ensure a secure and stable connection.