This backing plate is not interchangeable with any other brand of DA polishers!
For owners of the LHR21ES/Mark II/Mark III Bigfoot that uses the larger 6.5" (150/180) pads, you can install this backing plate so that you can use the smaller 5.5" (130/150) pads. Some people prefer the smaller pads with the larger throw of the LHR21, so this is the perfect solution.
This item will NOT fit the Rupes 15 & 21 iBrid cordless polishers or the Mark V 15 & 21 polishers.