DESIGNED FOR DURABILITY: While other retractable dog leashes easily snap, quickly fray, and can be easily chewed through, our retracting dog walking leash is made using an extra-tough nylon ribbon with a chrome-plated snap hook reinforced at the joint. This means toughness to control dogs up to 110 pounds and durability to withstand daily use. - GET IN CONTROL: Our retractable dog leash comes with a unique 'brake n lock' system to give your pup room to wander while you're still in control. With just one button, you can engage free mode to let your pooch explore, lock the leash in place, or smoothly reel it back in.