Emergency Leash is designed strong to control the largest dog, and small so ALL sized pets can comfortably wear it 24/7. It is VERY SAFE, it stays in the secure and locked length of your choice and will NOT deploy by itself. It also comes with a FREE lost pet reuniting service. SMALL - Near the size of a U.S. Quarter. LIGHT - To be worn by your pet 24/7. STRONG - 28" Kevlar™ cord. Made from durable materials. SAFE - Will not self-deploy. FREE - Pet Profile with Lost Pet Reuniting Service & more!