Hey, y'all, these are a useful resource. I've always thought they were clever!

FWIW, the solid rings may wind up being less forgiving so they wear out the cards faster and maybe be slightly more uncomfortable in your pocket ... There's a little cable dohickey might be worth having around, and I keep finding other things to do with 'em: www.amazon.com/gp/product/B...

Do share, and check out their website.