Protection Plus- Sliding Glass Door and Window Accessory (2 Pack) Sliding glass door accessory that helps prevent glass door mishaps. It is a visual marker and a lock that is effective for locking windows too. No installation is required, apply with a suction cup. Parents can also use the product to prevent their children from opening the door and wandering out, or it can be used as a ?third handle? on the door to help children go in and out freely. ***Please note that the Protection Plus Stars are a clear color and not greenish as they appear in the picture***Incudes: 2 x Protection Plus Stars- Clear color