High-Quality Steel Wire: The baby anti-loss leash has 49 stainless steel 304 wires built inside, wrapped in sturdy PU material to prevent fraying and breaking. It cannot be cut without special tools. The rope extends up to 2 meters / 6.6 ft. The spring has strong elasticity, remains undeformed when stretched, and has high load-bearing capacity. Comfortable and Safe: The soft and comfortable cotton wristband is made of a breathable sponge cushion, protecting wrists from uncomfortable scratches and sweat, making it comfortable to wear for both adults and children. The sturdy Velcro strap is adjustable, ensuring the wristband fits securely according to your needs and is not easily detached. Simple buckle design enables quick release and closure. Key-Lock Design: The leash features an upgraded key-lock mechanism, ensuring the child cannot remove the wristband by themselves. Parents don't have to worry about children detaching the leash connection on their own unless released by parents with the key. These wristbands are not toys; children should not wear them unsupervised, and parents should not teach children how to unlock them independently. 360-Degree Rotation: The safety leash is attached to the wristbands with metal cuff links. The 360-degree rotating stainless steel connectors protect toddlers' wrists from uncontrolled movements, ensuring flexible and secure activities so your children won't feel restricted. These wristbands are highly flexible; if parents don't follow, the leash could stretch too long, potentially causing the child to fall. Excellent Anti-Loss Wristband: It’s a great helper for traveling and shopping. With this child safety leash, your child can move freely within your range, and you no longer need to worry about your child running off and getting lost in public. You can even attach the child leash to your stroller or backpack. Perfect for supermarkets, parks, shopping malls, airports, scenic locations, and crowded places.