When accessibility is necessary but security can't be compromised, the Nite Ize SlideLock 360° Magnetic Locking dual carabiner is the answer. They can be used together or independently.
Features
Connected by powerful neodymium magnets, they can be used together or independently for quick access to small items like keys, tools, or just about anything under 6 lbs.
Threaded locking collar adds an extra level of security, and the carabiners can rotate when connected, even when the collar is locked
Collar can release quickly or be locked
Cast aluminum carabiners and collar with stainless-steel locking gates
6 lb. magnetic holding power
For utility purposes only; not to be used for any kind of climbing