There are copycat swivels out there. Make sure they are genuine Sampo. I have used CoastLocks for years, but change them annually because the do wear. The point of failure I've had is with the wire clip. Metal fatigue from opening and closing had it snap off.

I've never used barrel swivels, and have never trusted them.

BUT, the newer Sampos have the wire ending on the INSIDE of the swivel where the jess/leash line can get hung up. The older ones, do not. I will find the thread on this issue and post it.