I love these and use them for all my dogs--they have buckle collars for tags but if they're on a leash it's attached to one of these. I love that they're so gentle on the coat, and adjusted properly a spooked (or naughty) dog can't slip out. The rings are large and easy to grab with gloves/mittens in a New England weather. Lots of colors so very easy to know which one is for which dog. They also seem to last forever (nine years of daily use and counting on one). I've used these primarily on Belgians and BCs and it has been easy to adjust them so that they slip on and off easily, and are still secure, but don't choke. This might be harder if you have a dog with a head much larger than their neck.