High quality material: The spring lock is made of high quality 304 stainless steel and high strength springs, strong and durable. The surface is electroplated and anti-oxidation treated. It is very suitable for indoor useand exterior. It won't rust even in bad weather Security: 304 stainless steel spring lock, sturdy and rust-proof, long service life, weather-resistant material guarantees resistance to external factors, the superior quality of the lock can ensure security Easy to install: you can choose the location to install and drill 2 holes in advance. The aperture is 4.5mm. Just screw the spring lock to the door or window with screws, and it can be installed vertically or horizontally,saving time and effort Widely used: very suitable for truck doors, wooden doors, furniture, garden doors, gates, trailer doors, basements. When released, the strong spring will automatically rebound to lockthe door You will get: 6 stainless steel spring locks, the total length of the spring lock is 55mm, the height is 16mm, the diameter is 7mm, and the fixed opening is 4.5 mm Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.