Yeah,,,thats the only thing I could figure out that it would be good for,,,and not real sure about that,,,I mean my jinma has a little stop set screw thingy,,real simple,,,just a bracket with a little bolt that goes around that little rod on 3 point lift/lower control,,you set it at what ever spot on it that you want three point to stop lowering,,,,now if that didn't work,,or if 3 point started leaking down,,,yes,,,those chains would probably be my next move,,,but even than,,I don't think its a major job just to take that apart,,and replace the parts to make it work right again,,,,,,,,,but if your tractor works like its supposed to,,still can't figure what those check chains would do for you,,,,,,probably missing something,,[wouldn't be first time],,but at present can't figure out what it is....thingy