Prevent malicious intrusions! A new lock ideal for window security measures, easy to install with one touch, compatible with 28-42mm. - Model: New security window glass lock - Material: Zinc alloy, iron, rubber - Installation range: 28-42mm - Color: Silver - Use: Window security measures - Quantity: 3 - Body size: 59mm x 41mm x 40mm Easy to install without tools. Installing at the top and bottom of the window further enhances the security effect. No buzzer.