Having at last purchased an SDS drill, thanks to the advice from the Two
Daves, I'm ready to do something about various telephone and aerial
cables that adorn the outside walls of the house. The external walls
are granite and, over time, various people have tried to attach cables
with ordinary cable clips. The nails never penetrate properly,
unsurprisingly, and cables tend to just flap around in the wind.

Plan A is to drill holes, then insert lengths of dowel, held with No
More Nails, then use ordinary cable clips, with the nails going into the
ends of the dowels.

A suitable plan, or is there an alternative?

Thanks!
--
Graeme