Description These are some window safety locks which are made of aluminum alloy material for durable and practical use. No need to drill holes, prevent forced prying of windows from the outside, can offer enough protection for your safety and family safety, easy to disassemble and reuse, very convenient. The window can hold on the track by the key control. Features - Material: aluminium alloy. - Size: 6.00X2.30X2.20cm/ 2.36X0.90X0.86inch. - aluminum alloy materials, sturdy and strong, can serve you a longer time. - By keeping the windows partially open and closed, can prevent children from falling and have anti-theft effect. - No need to install extra tools, the window can hold on the track by the key control. - It can be used at home, in the office, school and any places you can think of. - The window locks can better offer protection for the safety of their families while improving air circulation. aluminum alloy materials, sturdy and strong, can serve you a longer time. By keeping the windows partially open and closed, can prevent children from falling and have anti-theft effect. No need to install extra tools, the window can hold on the track by the key control. It can be used at home, in the office, school and any places you can think of. The window locks can better offer protection for the safety of their families while improving air circulation.