I once made a patched cover for a play-pen mat just using the overlocker - tha's what we call them down here.
I would be lost without mine as I regularly use it when making items of clothing for my offspring.
Mine is a Janome 3/4 thread and after having worn one out (had it 14 yrs), I recently - about 3yrs ago bought a new one. I love it, but it really requires attention to detail when threading