I bought these spacers to use with my XJ's OR-Fab winch bumper so I could mount a Warn XD9000. The XD9000 is larger than the "average" winch and the end was banging into the angled outer lip of my bumper mounting plate area, preventing it from sitting flush with the plate. These spacers provided exactly the right amount of room for the end to clear the plate lip. They are way more robust than an equivalently thick stack of fender washers, and will do a much better job of withstanding winching forces. The package comes with the longer bolts necessary to properly secure the winch, too, so no worries there. The hole spacing is a standard size (or at least standard to Warn, I'm betting it's an industry standard too), which means there are probably many more uses for these, too, besides just the PP winch on one specific bumper. Bravo!