Original Links-It from Pawdentify - Easy to Use Dog Tag Clip/Cat Tag Clip - Made in USA (2014 Model) NEED A TAG?: To order our cute and colorful Tags or our new Links-It with Kevlar search "Pawdentify" on Amazon. Note that this product listing is for our original version of Links-It available while supplies last EASY TO USE: Attach tags and change collars quickly and easily. No more broken nails or struggles with old metal rings and hooks SAFE & DURABLE: Patented lock keeps tags securely attached to active dogs' collars. No sharp edges to snag. Tested to hold over 50 lbs and open and close over 10,000 times MADE IN USA: Made of DuPont Delrin material. SIZE: One size fits all collars. About the size of a quarter: 0.9"W x 0.9"H x 0.3"D. Holds up to 4 tags, including ID, rabies, license, and microchip tags. Fits standard tags with holes 1/10" or larger