an espag drive without having a handle and a cockspur type fitting
with the same square socket.
They are generally used in areas where windows are only to be opened
for maintenance or cleaning - for public areas, where the only staff can
open them, and in corridors or stair wells, for smoke ventilation.
All of them operate with a purpose made square drive key.
If
you see anything on this blog, that you think would help you out or you
have any questions and would like to speak to someone - please give us a
call.
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