Milliard 16ft. Retractable Belt Dog/Pet Leash - Tangle Free with Comfortable Grip Let your pet wander, without wandering off. Spring-loaded leash reel uses no batteries and gently takes up slack as your pet walks. Pressing the thumb-mounted lock button catches the reel in place when your pet needs to be brought back, and pushing it forward locks the button when your pet needs to heel. Compact design makes the leash pocket friendly and light. Nylon strap supports pets up to 50lbs. and extends to 16ft.