Key Ring
Key rings can either be purchased from an NPC vendor in some towns or crafted by a player with at least 10.0 Tinkering skill and 2 ingots.
To unlock something that is locked with a key on a key ring, simply double-click the key ring and then target the locked item.
Drag a key onto a key ring to add it to the ring. A maximum of 20 keys may be stored on a key ring, the image changing as more keys are added. Different types of keys may be stored together on a key ring, although blank keys which do not match with any lock cannot be put on a key ring.
To remove a key from a key ring, double-click the keyring and target itself. Unfortunately, this will cause all keys on the key ring to drop into your pack.
Keys will retain their description, if any, when removed from a key ring.