The 3mm random orbital drive attachment for the Flex PXE polishers allows you to quickly swap to a 3mm random orbit action. This can be used with any of the Flex PXE backing plates so you can either sand or polish in a random orbital drive action. Random Orbital is a less aggressive action when compared to the action of a rotary drive attachment for the PXE polishers, this makes it a safer choice vs going with rotary.