Features: *Made of high-quality aluminum alloy material, wear-resistant and corrosion-resistant, not easy to rust and break, strong and durable. *The spring window lock is designed with a spring inside, so the lock will lock automatically. *Circular pull rings on the inner rings, straight buckle edge on the outside, easy to open and close. *Easy to install and easy to use. Use with doors on decks to prevent falls down stairs. * Wide range of uses: can be used to enhance the safety of doors, doors and window, suitable for home, doors and window, etc. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: Aluminum Alloy Size: As shown Package List: 1 x Automatic Window Spring Lock