For taking nuts and bolts off or on without taking wrench off after broken loose.Kind of like a ratchet effect
Some people love them and some hate them.Never thought I needed them
https://www.youtube.com/watch?v=ftMnhGAVEzU
I have some that Snap-on made. Yeah, Don't use them much.
Thanks for enlightening me, not sure it will be coming out of the toolbox anymore than it has up till now.
i think they were called charlie wrench or speed wrench
Craftsman called theirs "Quick Wrench". I suckered and bought a set years ago and should have spent my money on something else. Kind of a novelty like the wrench that fits everything.