General description The 2 Pieces Automatic Door Lock is crafted from high-quality aluminum alloy, featuring a polished surface that ensures durability and resistance to rust. Its unique design includes a sealed weld and a thick reinforced base, making it both aesthetically pleasing and robust. This automatic spring latch enhances the security of doors and windows, providing a comfortable living environment. Technical specifications Material: Aluminum alloy Color: Black, White Size: 4.3 * 4.37 cm / 1.69 * 1.72 in, 4.3 * 1.35 cm / 1.69 * 0.53 in Screw size: M4 * 12 Installation Easy to install with a spring-loaded pull ring that bounces back automatically when released. Usage Suitable for various applications including family rooms, doors, garages, gardens, bathrooms, wardrobes, kitchens, offices, and hotels.