A safety wristband leash with lock is a essential because kid try to undo everything and learn buckle fast.Your kid wont be able to release the wrist leash without you. This safety lock is durable,easy to get it locked and unlocked. It is twisted metal wires inside of rubbery covering,hard to cut by a knife,strong enough for daily twisting and pulling. The wristband of the toddler wrist leash can be adjusted.The circumference of the smaller kids wrist leash side for kid can be adjusted up to 7 inches which would be also work for small wrist size of adult women.Our child wrist leash is suitable for 2 to 10 years old or even older,dont worry if your kid has a chubby wrist.The wrist leash for kids is very easy to use, all you need to do is connect the wristbands to adults and child's hands respectively.