The drive links on a chain saw chain are the small individual links that make up the chain. Each chain link is connected to each other by a metal pin that runs through the hole at each end of the link. You need to remove the metal pin to remove a link from the chain. Removing chain links is not hard and will not take a lot of time to complete.
Locate the chain link that you will be removing from the chain. Locate the pins at each side of the link. The pins will be flush with the edges of the link and may be hard to see at first.
Place the chain link removal tool over the pin on one side of the chain link. Make sure that the metal push rod on the tool line up with the pin on the link.
Turn the handle on the chain link removal tool clockwise until the pin has been pushed from the link. Repeat for the opposite side of the link. Once both securing pins have been removed, pull the link from the chain.
To replace the chain link, all you will need to do is place the pin inside the link and use the removal tool to push the pin back into the hole.