Durability The TUG retractable dog leash features extra strength and durability; a result of being built with high-quality internal components and the thoughtful considerations taken into account during the design phase of the leash. Comfort The ergonomic grip has a pleasant feel with a non-slip surface. To lock and unlock the distance of the leash, a simple \roll-on\ and \roll-off\ with your thumb will do the trick.  Ease Of Use If you're concerned about the distance between you and your dog, you can keep your best friend close by using the lock button to set your desired distance. So easy to use!  A Real If your leash breaks anytime within one year of purchase, we will quickly replace it at no cost to you. TUG even offers a one-time replacement for chewed up leashes! After that, you may have to train your dog or allow your puppy to finish teething. You may contact us directly for amazing customer service.Please remember to use a Large size leash for your pets over 55 pounds.