I've got an instrument face to remove. The lens is
held in by a "ring nut" that has four external slots
(90 degrees apart) that need a socket type wrench
with four matching "tangs" that would engage into the
slots. I cannot use a hinged half-circle wrench that
would be parallel to the face. Anybody remember the
name of the type of drive I'm looking for?
Thanks.
Steve Hammatt
Mount Vernon WA USA
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