I know this sounds daft but how do I drill through 4" brick then 4" air gap then 4" thermalite block, all in one neat and tidy operation, so you can see thro the small hole to the outside and easily feed a small cable? The masonary drills only come in at about 8".I wish to fit a bell box outside without showing the cable entry.Is there a very long masonary drill out there?
rgds.
tinpan
rgds.
tinpan