Key-Shirt / Key sets

In the daily life, have you ever met the problem that when you want to open a door or a lock, you need to try the keys you have one by one? The solution we come up with is to give every key a colorful “key-shirt”. Thus, people can quickly find the correct key by matching the color and meshing shape of the key-shirt on the key with the related instruction on the door or on the lock. This is a real time-saver; it guides the users by changing their perspective of an everyday operation.