Convenient: No need to install extra tools, equip a hex wrench on each lock window, keeping track by remote control. Security lock: This sliding window lock for home and the office can keep the windows partially open or closed to avoid the hidden danger that children and pets can climb out the window. Also, it keeps thieves out. Wide Usage: Can be easily applied in most environments. By keeping the windows partially open and closed, the thief and thieves can prevent children from falling and protect the safety of their families while improving air circulation. Durable material: it is strong , strong and durable, exquisite workmanship, aluminum alloy frame and stainless steel screws which can be reused for many times. Please check your track size before purchasing.