A coupe months back, I had a chain break on a ride and Steve Verdell had a quick link he let me use to finish the ride. I ordered a couple of the quick links for my saddle bag to to repay Steve.
When I tried to remove the one I borrowed, I was having no luck. . .so I googled how to remove it and found this site with great videos of "how to" concenrign bicycle repair, etc.