High-quality aluminum door lock made of solid aluminum alloy, strong and durable. Resistant to rust and corrosion, not prone to deformation, ensuring reliable long-term use. High security performance: Unlike traditional door locks, this automatic door lock features a spring mechanism that prevents accidental opening. Can be used with a standard padlock (not included) for enhanced security. Easy to install: The spring lock bolt can be installed quickly by selecting the desired location, drilling a hole, and securing with screws. Wide range of applications: Suitable for exterior and interior doors in homes, garages, gardens, bathrooms, closets, kitchens, offices, hotels, and more. Product Features: 1. Material: Brass, Stainless Steel 2. Universal Latch: 2 3/8" or 2 3/4" 3. Usage: Ideal for entrance, privacy, passage, storage room, classroom, hotel, and dummy applications.