I've been using the Greenlee Little Kicker for many years and all the offsets for 1/2" EMT fit 4x4 & 4 & 11/16 boxes perfectly. The 3/4" model is a little different and how much offset you get depends on how far you pull the handle, you can offset too much for a 4x4 box.

Few things are harder to put up with than the annoyance of a good example.