Everything bought was absolutely great with the exception of these ring crimps. The ring itself was very thin indeed and easily distorted it broken under a screw head and washer. I have some of this size in my own stock and these had a much thicker ring. I didn't use the ones from 12volt in the end. I have come across this before between batches bought from Farnellnand Rs components it must be down to different manufacturers or batches.
In all other components from 12 volt I have been totally happy.

Does what they are supposed to do. Easy to use, good quality