You will have a problem using these with certain types of XLR plugs. On some plugs the inner part of the plug needs the cable clamp to push it into its home position. When you fit oneof these on some plugs it will cause the cable not to be able to tighten to its fully home position, this in turn makes the inner plug not get fully home and it will be slightly loose in the housing.
this xcr ring by neutrik is a very handy piece of equipment to own. the green colour means it is much easier to identify the cable when in a box of cables. being neutrik also means good quality and these also seem to fit the newer xlr plugs.