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.MATERIAL: Engineering grade polymer/Zinc Alloy COMPATIBILITY: Upper - TubiMaster GX DF, NanoMaster DF, TailLux DF lights, and FlashFender DF with upper bracket Lower - Topeak QuickClick or most strap type saddle bags, FreePack, and FlashFender DF with lower bracket Not compatible with monorail or spring type saddle rails ATTACHEMENT: Saddle rail ADDED FEATURES: Zinc Alloy Strap Mount WEIGHT: 32g