that looks pretty useful. but may but may not work on all types of clips. some wrap all of the way around the pin and need to be hooked on one side and snapped over and on the other side.

This is not a small garage door door. Thinking this thing through, there is a reason there is not a manual release on this thing. It is a BIG HEAVY door. Just imagine figuring out a manual release for this door……what happens? The whole thing comes crashing down….and what would that accomplish? Now a door disconnected on the tract and god help the us if the thing did the accordion thing when it comes off the tract. i think the manuf. would have done this if practical. I appreciate the input. Haha the issue is not closing the door in a power failure. CheersA ups often will not work on a GDO due to startup load. The units with built in batteries will use a DC motor instead of AC.
I'd figure out a manual release as a first priority, then deal with power backup options
The open end points rearward.sytride and Pexto gave good info. I've never bought a set of pliers like that exact design, but it appears to be a good tool for the job. I have bicycles and motorcycles, and that looks like it would help get a chain set-up properly.
Now, a question about that chain clip: open end of the clip facing in the direction of rotation or opposite the direction of rotation?
I have a small chain vise which helps reduce the tendency to have a butterfingers moment while assembling a chain. It's probably 50 years old, I bought it new, and it works. I'm pulling a generic picture off the internet, as I'm not at the garage where I have that tool.
This is an OTC chain puller 4758 and is $22 from Summit Racing https://www.summitracing.com/parts/...eNIc8VX3RzAanmVMj5YCMhY5lZFcenwxoCrFUQAvD_BwE
Now, a question about that chain clip: open end of the clip facing in the direction of rotation or opposite the direction of rotation?
As @Codyboy says, rearward. To put it in other words, if the chain were to brush up against something, the clip should not be able to catch and be flipped off. With the open end away from direction of CHAIN travel, it won't happen.The open end points rearward.