WUZHOU Premium Material Made of aluminum alloy and stainless steel. The sliding window locks with keys are strong and durable, and are guaranteed to last a long time. Easy to install No additional tools or modifications are required for installation. Apply a lock to each window, which is controlled and held with a key. The use is simple or intuitive for an adult but cannot be used by small children. Smart construction These sliding door locks are strong, durable and precisely manufactured. With small but hard aluminum alloy frames and stainless steel screws. They can withstand the test of time and various climates, so they can be reused many times. Adjustable structure Adjust the stainless steel screw using the hex key to fit the thickness of the frame. Suitable for most horizontal windows, vertical windows and sliding glass doors. Important family helper These adjustable sliding window locks can be used to prevent burglars and thieves, and prevent fall accidents by keeping windows open or closed; while protecting family safety, they can also improve air circulation. Delivery quantity: 4 pieces, Package content: Only the above package content, excluding other products. Size: 24mm*30mm*24mm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Color: silver (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown in the picture.)