CHILD SAFETY: Safeguard your children by preventing them from wandering outside the house. Install the CAL Double-Bolt Lock at the desired height to keep them safe from potential dangers. HIGH SECURITY: With a tested capacity to withstand over 1000 lbs. of Forced Entry Load Tension, the CAL Double-Bolt Lock prevents criminals from lifting out the sliding glass door from its tracks, providing robust security against forced entry. SLEEK DESIGN: The lock's aesthetic and low-profile design seamlessly fits within the limited space between the sliding glass door frame and the interior door panel. Its discreet appearance ensures it blends effortlessly with your frame and window environment. VERSATILE USAGE: Designed for the middle junction of most double sliding doors, the CAL Double-Bolt Lock works effectively to enhance security. For impact sliding glass doors and windows in northern regions, a larger latch might be required. DOUBLE LOCKING ACTION: The CAL Double-Bolt Lock secures the door to the frame at two points, rendering any movement of the door impossible. Its double locking action prevents unauthorized access and ensures your peace of mind., Weight: 0.55 pounds, Manufacturer: CAL-TECH International, Inc