BB-7 bottom brackets for 2-inch track, outside hookup style. Made from 11 gauge steel with a drilled pin and Sold as a matched pair. They are custom-built for low headroom situations where the cable has to route on the outside of the bracket. Similar to the BB-5 but a different bracket model with its own mounting pattern. When your low headroom door on 2-inch track needs new bottom brackets, check whether you've got BB-5s or BB-7s currently because they are not identical. Match the existing bracket model and outside hookup configuration.