I have looked all over youtube and the web and cannot find any explanation of how to use this tool: https://www.amazon.com/Third-Hand-Brake-Adjuster-Yellow/dp/B0787T5KWD?&linkCode=ll1&tag=thedok-20&linkId=047e1d0adafb8be99411d69846fb2dcd&language=en_US&ref_=as_li_ss_tl

Can anybody explain how to use it?

I have looked all over youtube and the web and cannot find any explanation of how to use this tool:

^{From https://www.amazon.com/Third-Hand-Brake-Adjuster-Yellow/dp/B0787T5KWD}

Can anybody explain how to use it?