Easy to use: All you need to do is connect the wristbands to adults and kids hands respectively. The shrinking chain can extend up to 1.5 meters and the wrist strap circumference of kids hand side (the smaller side) can be adjusted up to 14 CM. Soft & Comfortable: soft double layers of hook and loop for kids hands, not easy to take off by themselves. The size of wrist strap can be adjusted according to your need, the soft sponge pad in the wrist strap make it comfortable to wear for both adult and kids. Durable: The connecting rope is made of stainless steel and wrapped with plastic, never worry this safety harness will be cut by knife. It is linked to the wrist straps with metal connectors that can freely rotate 360 degrees. Anti-lost: Only used to prevent children from losing when they go out, but do not prevent children from falling down and cant be used as a walking training equipment. Suggest for children aged 4 and over.