I saw Coop review these collars on his channel and that convinced me to buy a pair. It's no secret that they are basically ripping off Eleiko's oppen collar, and it's a mystery to me that they haven't been sued yet! In any case, they hold really well, and usually I only snap on one of the two clips, except for when I want an especially tight hold (e.g. during deadlifts). When both clips are deployed, the collars also work on smaller diameter axle bars, which was a nice bonus. Magnetic storage is also a plus. They basically live on my power rack when not in use. Get these before they're sued out of business!