I've had two Poles and Holders flagpoles. I've managed to break them both and now looking to replace the last one. Corky is great, love the guy and he's fixed mine numerous times all at no charge and ...
I use a Superior 3, 30ft telescoping flag pole when we go to races. Holds 3 flags 3'x 5'. Uses spring loaded buttons at each extension. They also make 20' and 25' poles as well. A little pricy but will be the last pole you'll need to buy. They have a couple different mounting options. A company called Telepole. http://www.tele-pole.com/