Kids' Child Safety Harness with Lead - Mint Green - Color: Mint Green - Material: Nylon & Plastic - Feature: Extendable Lead - Buckle Type: Quick Release Buckle - Application: Child Safety Lead The child's side has a locking function, and the adult side unlocks with a key. I purchased this but decided to use something else, so this is new and unused. Please read my profile, and feel free to comment if you have any questions. Thank you.