I had a problem with the front skewer. Trying to tighten it enough to secure the wheel the alloy nut simply was too soft to withstand the force of the steel hex key and it rounded out, the key gouging out the alloy until it just span round ineffectively. I don't see that other people have reported this problem and the rear skewer seems to be working ok. I must have got a sub standard item. They are very light and look attractive just shame that the front skewer failed in strength. Can't recommend because of this and trying to negotiate a solution with the vendor failed.
very light. but very easily broken.