Package Include: Window Security Safety Locks x 4.We promise the premium quality and the best service. If you are not completely satisfied with your purchase, simply let us know and we will provide you with refund or replacement.Safe Locks: Sliding window locks are screw mounted on the sliding window/door track to prevent sliding and increase security. Simply tighten them with a hex key to fully secure windows/doors or allow ventilation without additional tools. It can prevent thieves from entering through the window and escort your safety.Easy to Use: Quick installation in just two steps. No drilling required, simple operation, 2 minutes to complete the installation, easy to reuse and reinstall. The matching key can be perfectly controlled, and it is very easy to install and remove at will.Sliding window locks are great for sliding patio doors, sliding glass doors, and more. Equipped with 4 locks, 4 keys enough for your daily application. Effectively prevent the risk of children and pets falling from heights.Sliding Window Lock: This window lock is suitable for sliding windows, sliding doors and vertical doors. Use high-quality thickened aluminum alloy material with stainless steel screws. Strong and durable, not easy to corrode, not easy to rust. Put some window latches in your child's room to prevent your child from falling through the window.