This probably falls under the category of 'things everyone knows
but no one ever told me.' My experience is that most quarter-inch
square-drive socket wrenches are more or less mutually compatible,
leaving aside details like pin- vs. ball-detents. The male end is usu
about 0.248-0.252": that said, I don't know what to make of a
Snap-On handle that measures 0.278", and a matching 3/8" socket
with a 0.282" square aperture. The only reason I can think of to make
wildcat sizes is to prevent people from mixing sockets and drivers from
another maker (thereby also making them less attractive to steal).
But maybe there's another reason? Did Snap-On make sockets in a
'just-bigger-than-1/4" series? Or was this a custom job? Picture attempts
to show the oversized Snap-On handle compared with a more standard
Plomb ratchet. (I think I also own some *undersized* 1/4" extensions,
unmarked but vaguely Cornwell in look, but may have tossed them as
useless.
