KMC K710 Missing Link
Because of their mushroomed pins, using a master link on KMC K710 and K710 SL chains is highly recommended over pushing the pins out and back in (which can damage both the pins and side plates, creating a weak spot).
If that's your chain of choice, pick up a few spares. Missing Links are good to have around.
• for use with KMC 1/8" K710 and K710SL chains only
• installs easily without tools and can be re-used