TANGLE-FREE EXTENDABLE DOG LEASH: The nylon ribbon is designed to be tangle-free and the anti-twist feeder will help you get easy to control your dogs. . ONE BUTTON BRAKE & PAUSE & LOCK: Just roll-on/off quickly with your thumb to adjust the distance between you and your dogs at any time. The locking mechanism with the anti-fatigue spring inside is strong enough to stand up to pulling. . HIGH STRENGTH AND DURABILITY: Durable enough, this strong dog leash can securely hold your dog without ever breaking. No more worry about your dog has a tendency to pull strongly when it gets excited over the things that they see or smell. . COMFORTABLE GRIP: Its ergonomic grip handle allows you to run with your dog. You wont hurt your hand anymore when your dog is pulling too hard. And with the one-hand brake button, you are able to quickly stop your dog in an emergency. . PERFECT FOR SMALL/MEDIUM DOGS: It is designed for dogs weighing up to 20kg (S/M) /50kg (L) - small and medium dogs, giving them maximum freedom and protection under your control. .