Purchased new about two years ago. Used twice to change the single-speed gear. Disinfected with wet wipes. [Product Contents] For 4-notch single-speed freewheels used on some general bicycles and BMX bikes. A freewheel remover for installing and removing 1 to 11-speed sprockets on the rear wheel of a bicycle. The shape varies depending on the manufacturer and year, and these tools are not compatible with all of them. Park Tool has a lineup of tools that support most freewheels on the market. Used not only for freewheels but also for disc brake rotors. Wrench size: 25.4mm (FRW-1, SR-12/18.2, etc.) #bicycle #bicycletools #ParkTool #ParkTool