They were made to operate a top hung light, where there was
a deep window board and could be used as singles for narrow
lights or doubles for wider ones.
I still have quite an amount of the "Double" type but none of the
singles, with the ring on for pole operation.
So, using an original option for inspiration, I have done a simple
conversion to a double unit, to make it into a "Single Tee Bar"
type.
metalwindowparts@gmail.com
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