PRODUCT DESCRIPTION
This 4 7/8" backing plate is flexible and fits the 5.5" Pads.
NOTE: This HD Backing Plate is designed to work with the 5.5" Pads and are a snug fit. If you use your own backing plate with these pads, be sure it is no larger than 5 1/4" in diameter for DA and 5 7/8" for Rotary. Larger backing plates will not fit on the 5.5" pads.
Standard thread 5/16-24