High Quality Material: The spring loaded automatic door bolt is made of solid aluminum alloy, which has the characteristics of anti rust, anti corrosion, non-deformation, toughness and durability, and has high hardness and strength. Unique design : The inner ring is equipped with a spring and a circular pull ring, which is convenient to change; the base is thickened, and the handle is cast as a whole, with high stability.Easy to Install: Align the door bolts with the door and door frame, then drive the set screws into the wood for fastening. This slot can be installed according to your needs, and you can install it in minutes. High Security Performance Although the door bolt is small, it has high hardness and good stability. It is equipped with a spring and will not be easily opened by mistake. It is safe and protects privacy.Wide Range of Applications: The door bolt lock is suitable for fixing small doors, windows, yard doors, desk drawers, cabinets, tool boxes, storage cabinets,