Usefull for linking truss types together, thomann only stock global truss now, whereas all the truss I bought off them before was prolyte. This adaptor allows the two types of truss to be linked together. They used to come with stamped pl and gt markings etched in to make sure you get them the right way round, but they don't bother anymore, but easy to use a sharpy to mark it up yourself.
Shame they don't come with pins and clips anymore, the parts needed to make it all work have to be ordered separately. Otherwise all good!