You’ll see and feel the difference between Bison ZipCrank systems and other manufacturers’ systems. Bison uses our experience as a manufacturer of competition grade equipment to offer TruGlass tempered glass backboards that give players a more realistic rebound. Every backboard has an aluminum frame just like those in the gym. The extra heavy poles and front crank style height adjustment are designed to change the height of the breakaway goal from 7 1/2′ to 10′ with the turn of the removable crank handle. As an added bonus, Bison ZipCrank systems can be mounted closer to fences, walls or other obstacles than rear height adjustment systems. All Bison residential systems include free fitted pole padding. The direct burry pole is intended for permanent installations or a BA709 ground sleeve can be ordered.