FLYBOYS Checklist Rings - 10 Pack (1.75 in Diameter) (Opaque)

Very sturdy, comparable to other brands. They are a little hard to disconnect at first, but it gets easier after a couple of times.

I love how they become an almost seamless ring. They also make great keychains. Easy to get key off and on the ring without busting a fingernail or having to get out a tool.

I'm an in shape 200 pound man and I couldn't get any of these clasp/clips to open with my very strong fingers. Anyway, didn't grab a tool to open the clasp for two reasons, one, you shouldn't need a tool to open a finger clasp, two, I want no signs of damage when I return this junk. I'm baffled by the good reviews; may out sourced to our favorite sell overseas who made a bad copy of a functional clip. Even when clasped, I can see the ball doesn't fit into the clasp joint properly. Don't waste your time or money. Btw, I used these type rings in the USAF for 20 years and know how the product should function and quality required.

I wish I had been introduced to this product earlier -- many uses, beyond flying.Plus, the seller is great.