Insert the square cutter and turn the drilling mode to rotation stop and hammer action entirely. Locate the guide about the cutter around the central fixing hole and drill the square cutter into the wall. May see make penetrates the wall, chiselling away the corners to generate a perfectly sized, flat backed hole for the metal back box to fit in nicely. The final secret in order to talk to everyone may. Everyone is a prospective customer. Friends, family, neighbours…