I remember hearing that on the ZipDee new century box awnings, you can use a 7mm allen (hex key) wrench to manually retract or extend the awnings.

Is 7mm the correct size?

To be used in a drill driver the long straight section of the allen wrench is needed. Do I just cut off the L-shape portion or does someone make an appropriate straight allen wrench?

Is a really long one needed?

I don't need it right now and if I get one and keep it in the bus, I will likely never need it. If I don't have it... that never works out well for me.

Thanks!