Do all bike chains have a master link? Nope, not all chains have master links. If your bicycle has derailleurs, it means it’s unlikely that your bike’s chain will have a master link.
What is chain hook?
: a hook used for dragging or lifting cables.
A master link or quick-release link is a roller chain accessory that allows convenient connection and disconnection of a chain without the need for a chain tool. It acts as a set of the chain’s outer plates, so joining two sets of the chain’s inner plate ends. Such master links may or may not be re-usable.
How do you break a chain Quick Link?
To disconnect this type of link, place one jaw of your pliers on the chain pin, and the other jaw on the open end of the clip. Then squeeze your pliers until the clip pops off. Then you can remove the outer plate and slide out the rest of the link.
Make the hacksaw cut at a 90-degree angle, and cut completely through the link. Pull the link apart gently using a pair of pliers on each side of the split. Close the link together again using a single pair of pliers to squeeze the two ends together.