A saddle rail fixer that allows fast and easy tool-free mounting and removal of two separate accessories that are QuickClick equipped underneath the saddle cleanly and securely. Duo Fixer system allows to mount Topeak QuickClick saddle bags or most strap type saddle bags and provides dual use with Topeak Duo Fixer system accessories including Tubi tools CO2 inflators lights and fenders. A simple slide and click is all it takes to go on a safe and secure ride.Allows lights to be mounted above fenders or bags or multiple other combinations of itemsCompatible with steel CroMo titanium and carbon standard saddle rails with 36mm width spacing and at least 30mm height spacingNot compatible with monorail or spring type saddle railsCompatible with QuickClick saddle bags or most strap-type saddle bags with included strap mount adaptor