I've seen it in videos before too, all the little RC planes use them.
@Red97 had a fairly recent one on a saw, he also had a nice device that let the socket spin with the engine once it started so it didn't damage the tool you were using or the tool operating it lol.
Hopefully he can comment on what that adapter was and maybe link the video as I don't remember which one it was.
Also you can turn the on/off switch too off so it will get turning and then turn it on while it's spinning. Doing it this way may help get the engine up to speed a bit easier and then turn it to the on position while still cranking it.
Who were you responding too here, I think I know, but it wasn't in this thread if I'm guessing right.