These pad drivers are designed to run smoothly at the higher 300 to 350 rpms of many dual and high speed machines. Another plus is that each component can be replaced when it wears out. We stock each component, and can sell them individually as the need arises. We recommend that you keep these two inches below model size, as the rubber riser can flex enough to allow rubbing of the face, which can shorten the life span.
Replacement faces & risers are also available, contact us for sizes not listed.