The topeak fixer 7 bracket features a quckclick seatpost clamp for attaching your dynapacktrade to your seatpost the bracket also includes adapters for different seatpost diameters the quickclick seatpost clamp makes installation and removal easy and quick it attaches removes quickly from the seat post via the quickclicktrade clamp the topeak dynapacktrade is the ideal saddle pack for all you tools keys or phone instead of having everything jingling around in your pockets whilst