Review on Mighty Paw Slip Collar: Premium Stainless Steel Choke Collar for Effective Dog Training with Strong, Durable, Weather-Proof & Tarnish-Resistant Metal Chain by Jessica Veliz

I had to watch the video after receiving this item because, like many other one star reviews, I was surprised that both rings were the same size. I haven't seen anyone post a solution and I'm very surprised the manufacturer hasn't. Either way, you thread the chain through one of the rings yourself, and it looks like your dog's head is going through it. The rings must be the same size. I felt so stupid when I got it and couldn't figure out how to assemble something so simple, especially since there are no instructions. Four stars only because I've seen this as a common problem with no guidance or solution from the manufacturer.