is used as a speaker extension ...

Cable is well made and so in about 15-20 cm, the cables are secured so they do not separate themselves from each other in front of the connectors with a locking plastic. That's a good thing.
But I wanted in any case actually two individual cables, so they were but cheaper. The plastic fuse I have carefully worked with a scalpel and then ripped apart the two individual cables.
Now I have 2 single cinch cord for my speakers.
Quality, delivery and price are very good. I did not find fault.