Joined: Jul 2015
Posts: 7,465
Likes: 3,281
From: NW Oregon
Bikes: 1982 Trek 930R Custom, '91 Diamondback Ascent w/ XT, XTR updates, Fuji Team Pro CF road flyer, Specialized Sirrus Gravel Convert, '09 Comencal Meta 5.5 XC, '02 Marin MBX500, '84 Gitane Criterium bike
the pins in the master links wear just like the rest of the chain's pins wear.
the quick link is good for the life of the chain... it can be removed and reinstalled multiple times, just don't expect it to outlast that particular chain... they make great emergency backups in your tool pouch, though.