Description   Non directional design for easy assembling Patented MissingLink Connectors with increased safety   KMC 12 Speed Missing Link Chain Connector – Aurora Blue Model: CL552 Fast and easy assembly of bike chain Non re-usable Compatibility with KMC, Shimano and Sram 12 speed chain Packaging includes 2 pairs of missing link KMC 11 Speed Missing Link Chain Connector – Aurora Blue Model: CL555R Fast and easy assembly of bike chain Re-usable Compatibility with KMC, Shimano and Sram 11 speed chain Each packaging includes 2 pairs of missing link