I bought this primarily as an olive stoner. It is possible that it might work on very small olives, but the big green Italian kind I buy in large tins are almost impossible to insert into the pitter in the first place, and then the plunger goes off center just enough to jam the stone. As an aside, the not so clever metal hinge stopper on the end which is supposed to keep the thing closed when not in use is badly cast and simply will not work. This is a piece of junk, even, I suspect, for cherries.