Square headed L Keys??

[RPR]

Where can one fine L shaped wrench square headed keys.
In B&Q, atlantic home care found Hex L keys....but not ones with square shape.

We, have a light socket that has screws with square head...just cannot unscrew it ....to fit another set of lights.
Help..!!

 

[bankrupt]

If you're stuck, a flat head screwdriver that fits the diagonal should be able to open it if it's reasonably free.

 

[SineWave]

Failing that, an electrical wholesaler. Those screws are used by electricians when working overhead.