Blisstime Toddler Leash with Key Lock, Upgraded Anti Lost Wrist Link Baby Leash with 360 Degree Rotating Connector and Adjustable Bracelet for Babies Toddlers Child Kids (6.56ft/2m, Dark Gray)

"Unlike the old kid leash that uses hook and loop closure which is easy to be opened by children or others, our upgraded toddler leash comes with a small key on the parent's wristband.

If you want to open the child's wristband, you must use the key on the parent's wristband, making it safer to use."