Those are called rivets which are extremely durable and strong when installed correctly using a rivet gun, however, standard stainless bolts and nuts sourced from a local hardware store will work just as well.
These are the perfect addition to my JCW. I have a red over black JCW with the Xenon head lamps & black housings. These are the perfect way to tone down the brash bright red of the tail/brake lamp housings to match the front lamps. Not only do you eliminate the chrome but the housing itself is black thus darkening the appearance of the entire assembly. I would say these should be flying off the shelf but i don't want everyone to have a MINI that looks as good as mine.
Scott Hiskes
I have now one of the best Mini Cooper JCW in Switzerland, thank you Outmotoring:)
Bruno
I bought a Convertible Rear Beltline Trim Kit for my R52 . I was really concerned if it was going to fit like the original. This part is very expensive, so I was quite concerned. I finally bought it and it was the best thing I bought for my Mini. It fit perfect. Outmotoring customer service was amazing. These guys are a class act. Thank you.