13mm square socket for Subaru rear differential

[mattthemuppet]

thanks and yes, a 1/2in ratchet or extension would probably have worked fine - others have done just that. I wanted to use that piece of hex stock for something useful and I was also worried about wallowing out one of the plugs, as it has a much shallower bore than the other one (5mm vs. ~11mm). They took quite a bit of force to get off too!