UPGRADED POWERFUL SAFETY CARABINER CLIP: Our professional carabiner buckle is made of higher density material, super strong but lightweight, providing a 800+ pounds break strength. The hooks with safety locks on both ends prevent breakage effectively caused by your dog's rushing HEAVY DUTY NO TANGLE DOG CHAIN LEASH:Our reliable, heavy duty dog chain leash features a sturdy 4mm thickness and is expertly welded for added stability to ensure your pet's safety.The 360° swivel hook increases flexibility,make sure dog lead doesn't tangle while playing CHEW PROOF & RUST PROOF:Our zinc coating can prevent rainwater and soil erosion,and also prevent rust and friction. Unlike ropes or cables on the market, you don't have to worry about your beloved dog biting through it VARIETY OF SIZES: Available in 3mm/4mm/5mm models and lengths of 5/10/15/20/25/30/40FT, 3mm is recommended for small dogs under 90LBS while 4mm and 5mm are for medium and large dogs up to 150-200LBS MULTI-FUNCTIONAL CHAIN DOG LEASH:Dog tether can be tied to a dog stake or tree, making it a popular choice for yard, park, and camping dog walkers, providing more space for dog walkers to run and train Heavy Duty Dog Tie Out Chains Leash for Outside