What is the fine-grained topic of the following text: 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. Only return the topic.
Adjustable features of Bison ZipCrank basketball systems