A word of caution
As others have noted, the squeezer will produce more squeeze the closer it gets to the end of stroke. One side effect this can have is if you are squeezing a long rivet and crank the pressure up, the squeezer may just barely be able to start the squeeze, but once it gets past the critical point, it has already built up full pressure in the pneumatic actuator and can snap closed really fast in an uncontrolled manner.
On long rivets I normally use my hand squeezer. It's quicker than adjusting the pneumatic squeezer to do it in two steps.