http://www.brokenhomme.com/shop/…
Got this about a month ago and haven't had any issues.
http://www.bestmadeco.com/collec…
If you're prone to losing keys, I use a nautical snap shackle. You need to pull the little ring to pop it open. (great if you want something overkill)
https://d1t8ok2zesyvw2.cloudfron…
https://store.kaufmann-mercantil…
I'm using this. Simple, easy to get it on and off but doesn't drop accidentally.