LEGO Techniques - Gripping the Handle

The Repair Lift review from last week had some other surprises as well.  And not just the Man Car.  I've wondered for a while how big the stops on the 1x2 plates with handle are.  I surmised that they were 4.8mm (since TLG uses a grid of 1.6mm for designing their standard pieces).  But given the architecture around them, there's really no way to get an anti-stud around them.  So then the question becomes, what is the same size as an anti-stud but partially open?

A wrench, naturally.

 I see some potential here for a creepy five fingered hand.