Super durable and backed by a lifetime warranty of adventures - never buy another leash again! Your dog doesn't mess around when it comes to exploring, and neither should their gear.Made with 3/8", durable rock climbing rope trusted by climbers - you'll always have the strongest grip on even the biggest breeds! Designed with versatility in mind, you can tie knots for variation in length, use hands-free for trail running, or implement a harness-like configuration that's perfect for pups that pull. DESIGN & DETAILS: Made with 3/8" tightly spun, polypropylene/polyester rope 1.5oz, 55 mm x 90 mm aluminum locking carabiner attachment - rated for 17Kn Made for medium sized or larger dogs Suitable for use with almost all collars, including everyday buckle collars, quick release collars, prong collars, martingale collars, gentle leader-style walkers, harnesses Do not use with a metal choke chain training slip collar