Chew Proof: 16ft Retractable dog leash with 2 heavy duty wire ropes which are chew proof, and the length of two wire ropes are 19.5in and 27.5in, while the fabric rope of the leash it not chew proof.Dual Dog Leashs: It is designed to used for two dogs walking, running or training with 2 heavy duty wire ropes.Heavy Duty Internal coil: Top durability internal coil spring for consistent retraction several years,perfect for large dogs up to 110 lbs.One-Handed Brake,Pause,Lock: This pet leash is equipped with a very simple locking mechanism, quick Lock And Unlock Feature - Easy Roll-On and Roll-Off With Your Thumb.Ergonomic Anti-Slip Handle:Our retractable dog leash features an ergonomic anti-slip handle that keeps your hands comfortable even on long walks. Youll also appreciate the bonus d-ring that holds poop bags or keys. Any problems, don"t hesitate to contact with us