O.K. / Product design

A key is used for an unique lock, so as to open it. However, we may lost our keys, or be confused by similar configuration.
Now, it’s show time for out O.K. It is born with following advantages.
a).A container of keys with a fashionable outlook.
b).Distinguish keys by different length in each groove.
c).Keys are easily taken out with a little trigger.
Life is much more simple to handle with our O.K. Would you like to have one ?