410 Chain Master Link The 410 Chain Master Link will replace that old, busted 410 chain's master link Installation couldn't be easier: with a chain breaker, remove your old master link. In the open ports, slide the new master link's pegs through and then the link cover plate over them on the opposite side. Slide the locking plate on to both pegs of the master link, and you're ready to ride Note: 410 master links will only work on 410 chains, and are not compatible with 415 chains