There will not be any prominent growth with those squeezers, but it is definitely quite a good thing to develop your wrist and forearm strength, so it is a good idea to use this thing on a regular basis. Besides, since you are doing it at the office, it is even better.
@muskate has outlined a very important point - make sure to take some rest days from time to time so that your muscles will have some time to get recovered and consequently grow.