These Nite Ize SlideLock 360-Degree Magnetic Locking Dual Carabiners are connected by powerful neodymium magnets allowing you to quickly access items from one side while the other remains clipped to your bag, key chain, or other items. The threaded locking collar adds an extra level of security and the carabiners can rotate when connected, even when the collar is locked. When accessibility is necessary but security can't be compromised, the SlideLock 360-degree is the perfect solution. These dual locking carabiners are connected by powerful neodymium magnets. They can be used together or independently for quick access to small items like keys, tools, or anything you can imagine up to 6 lbs. (2.7kg) that may need to be clipped and accessible. These Nite Ize SlideLock 360-Degree Magnetic Locking Dual Carabiners measure 1.6" x 3.3" x .74" (40mm x 84mm x 19mm) and weigh 0.8 oz. (22g).