Precision connection for 9 gears. The more gears, the thinner the chain. This 9-speed link (1/2"x5/64") fits perfectly on narrow derailleur chains (IG/EXA). Simply click the chain closed for a sturdy connection under heavy loads. Additional information Suitable for: 9 speed. Size: 1/2"x5/64". System: Derailleur (narrow). 8711646208898 The Simson connecting link 9 speed has a size of 1/2x5/64. A broken or new bicycle chain can easily be connected with this connecting link. You use this connecting link for bicycle chains of bicycles with 9 (IG/EXA) derailleur gears such as the Simson Chain Derailleur 9. You click the connecting link onto the end of the chain without the use of tools.