KMC's MissingLink master link allows you to connect one side of a 10 speed Shimano, KMC or Campagnolo chain to the other. Simply cut the chain to length then clip the MissingLink to each side of the chain, fasten and apply pressure to the chain or use a chain plier to lock the MissingLink in place and installation is complete. These are compatible with virtually any 10 speed drivetrain but you will need to select from 5.88mm for use with KMC or Shimano 10 speed chains and 5.90mm for use with Campagnolo 10 speed chains.
These master links should be installed new with a new chain and disposed of with the chain, when the chain has reached the end of its life cycle. Select 5.88mm width for KMC and Shimano 10 speed chains and 5.9mm for use with Campagnolo 10 speed chains.