Ok. But remember, this is minimum hole to run three RG59 cables. Better way, is run some tube, for future cabling, or faulty cables easy changing or replacing to other cables (Cat5, as an example).
I was thinking of running the cable through a conduit box with conduit attached to the back of the box which runs through the wall . do they have any special fittings for conduit boxes to secure the cables and block out water? water is a concern