Klippy - Pet Tag Quick Clip for Dogs and Cats New Improved Design! Use Klippy To Quickly Move Pet Tags Between Collars Choose From 5 Colors! Comes With A Split Ring Attachment (pictured) Works On Virtually Every Collar Size (max 11/64-inch, the diameter of D-ring on most large collars) The Klippy is compact and versitile design working perfectly for cats and dogs of all sizes.