4 in 1 Key / Key

4 in 1 Key is a key which integrates 4 keys into a single key, thus scaling down the number of keys. If you are tired of carrying too many keys around, 4 in 1 key brings an ideal single-device solution. 4 in 1 key contains four combinations. First choose one side of the key and then rotate the key to get one combination. Then insert the key into the key way. The gaps between the key pins align with the shear line to allow the plug to rotate, thus opening the door. With a single 4 in 1 key, you can open the home door, room door, garage door, and car door. You still have to carry keys but all you need is this 4 in 1 key.