Features: brand new and high quality Thickened iron, sturdy and durable. It can prevent children from opening the window too large and causing danger, and it can also prevent children from opening the sliding door and turning over things. When the weather is boring, it is not safe to open the window at night to breathe. It is safe and convenient to lock the window with an auxiliary lock to breathe. Suitable for all kinds of sliding for windows and doors. Rotate the switch to change the distance between the card slots. Package Includes: 1x Sliding Window Lock Specifications: Material: Iron+Aluminum Alloy Weight: 80g Size: 3.5x6x2.3cm/1.37x2.36x0.90inch Color: Black/Brown note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.