Features: 1. It is sturdy, sturdy, exquisite workmanship, aluminum alloy frame, can be reused many times. 2. Safety: To protect children from accentuated falls, avoid accidental opening by children 3. No need to install extra tools, it is equipped with a key on each window lock to keep you on track with key control. 4. It can be easily applied to most environments; keeping window partially open and closed, burglars and thieves can prevent children from falling and keep family members safe by improving air circulation 5. Versatile use: sliding window locks can be easily installed in most environments, such as patio doors, sliding glass doors, sliding doors of hotels, apartments, hospitals, schools and offices to give children a safe environment. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: aluminum alloy Size: As picture show Weight: 36g Package List: Choice 1: 1x Window Lock Stopper Choice 2: 5x Window Lock Stopper