Ford's horribly swollen nuts. I was able to loosen all of my nuts except for two that were swollen from Ford's technique. I ordered this half size up from the usual 19mm (or 3/4 standard). I didn't have high hopes, but with the help of a crowbar and this gem, I was able to carefully remove the remaining two ledges. As a bonus, it doesn't look like I damaged the outlet. I highly recommend it (your mileage may vary depending on the condition of your cleats).