Rogue attachments will fit any rack that has the same tube and hole size as the Rogue equipment the rack accessories are intended for. Hole spacing will need to match up as well if there are multiple pins in the attachment.  In this specific case, the PRx Profile PRO has different sized holes on different faces of the uprights. The front face is 1-inch holes through the hooking area, while the sides have ⅝-inch holes. All uprights are 3-by-3 inches. For an attachment going through the front, a Rogue Monster-compatible attachment would work. For the side, a Rogue Monster Lite-compatible attachment would be needed.