It's asking swivel. what else do you want to know? - Geissele Heavy Duty Push QD Sling Swivel Button

It works. Not much to it. Not sure why you'd be reading a review on a sling swivel. Probably the same reason I'm writing one. Using this on my Geiselle super duty with a vickers sling. I mean, these are barely more than the cheap Chinese ones on amazon so why not go with a reputable American gun company. Good luck to you!