SAE sockets and 13/16" will not fit my 21mm nuts as per the description. If you want the largest or smallest socket you will need the green one Using part as a cross and it's too short to unscrew the tight jam nuts Plan to bring along a piece of tubing or a 1/2 flare extension to use as leverage, but since all four ends are different shapes you'll have to Figure out what size and shape of extension you need based on the size of the nut.