Made from 6061 Aircraft grade aluminum, our Heavy Duty Boom Stick is conveniently adjustable for different wheel and tire sizes. It only takes a matter of seconds to adjust or remove so that you can get back off-road without hassle. No tools are required to install it, and it includes 2 heavy duty 6061 Black Anodized aluminum locking rings with carabiners to secure your flag. Pole diameter is 1″.