DOUBLE LOCK DESIGN: Our sliding window locks feature a unique double screw mechanism that securely mounts onto the tracks of sliding windows and doors, preventing unwanted movement and enhancing security. Installation is straightforward; simply use the included hex keys to attach the locks, allowing you to fully close your windows or open them slightly for ventilation without needing additional tools. Each lock includes rubber cushioning to protect your window surface from scratches and damage. COMPATIBILITY AND USAGE: These locks are designed for sliding windows, sliding doors, and vertical doors. Each lock measures 2.4 inches in length and is compatible with track widths up to 0.4 inches with rubber cushioning or 0.67 inches without it. Ensure a proper fit by measuring your track dimensions. HIGH QUALITY MATERIAL: Constructed from durable aluminum alloy with an anti-rust coating, these locks are ideal for both indoor and outdoor use. Their design complements standard white sliding windows and doors. PRACTICAL APPLICATIONS: Slider window locks provide an extra layer of security for sliding patio doors and glass doors, allowing you to partially open windows for fresh air while preventing intruders from entering. They are also perfect for childproofing; install these locks in a child’s room to keep windows secure and prevent falls. PACKAGE DETAILS: This package includes four sliding window locks, complete with rubber cushioning and keys. Installing multiple locks enhances the security of your windows and doors for added peace of mind.