High Quality: Our automatic spring loaded latch is made of thick aluminum alloy, and the surface is multi-layer polished. It has the characteristics of rust and corrosion resistance, while ensuring firmness, durability and stability. Easy InstallationTighten with a Phillips screwdriver, make a small hole before the installation, you can install it at different angles, do not use a hammer to directly install the screws in the package, high quality door bolts provide greater security for doors and windows. ENHANCED SECURITY: High quality window and door locks provide increased security for doors and windows. Add a lock and be safe once. Even if you are away from home, you don't have to worry about your home security. Sliding design: the appearance is exquisite and concise, sealed and welded, the base is thick , not easy to break and deform, and it is strong and durable. The latches provide extra security and make your living environment more comfortable. Product Description: Aluminum alloy automatic security latch for window door/sliding door.; Features:; 1. It has no rust, corrosion resistance, etc., while ensuring firmness, durability and stability.; 2. High quality door bolts provide greater security for doors, gates and windows. ;3. The Aluminum Alloy Window Door Security Auto Latch includes mounting screws that are easy to replace, durable and sturdy.; Material: Aluminum Alloy.; Colour: black.; Dimensions (length, width, height): 5.4 x 2 x2.2 cm.; Package Contents: 1 self-closing lock and 1 self-tapping screw.; Note: 1. Due to manual measurement, the size may vary by 1-2 cm. 2. Color may be different due to different monitors.