Key FeaturesRecommended use: repair a broken chainEasy to installation, no tools neededSingle-use connecting linkReusable bicycle chain linkSpeeds: 5, 6, 7 SpeedDescriptionThis KMC Missing Link Bicycle Chain Link (5,6,7-Speed, 6 Pairs) is fastest and easiest way to install your chain. They go on by hand with no special tools and only require a stiff tug to add tension to the chain for them to snap into place.