The limiters are used on a wide variety of sliding doors, windows, and patio doors. They are equipped with a hex wrench for precise adjustment and ease of use; The simpler design is easy to install and locks your sliding doors and windows. It comes with plastic pads to protect the surface and a hex wrench for precise adjustment; The main body is made of aluminum alloy and stainless steel screws. It is durable and helps you eliminate hidden dangers and ensure the safety of your family; The Limiter Adjustable Sliding Window Locks protect against thieves and burglars and prevent falls by keeping windows open or closed. They not only ensure the safety of your family, but also improve air circulation and much more; The total length of the hex key is 50 mm, the lock body measures 30 x 24 x 23 mm, and the cylinder hole has a diameter of 10 mm. Before purchasing these window security locks, please make sure that the thickness of your window rail does not exceed 16 mm (note: not suitable for the center window rail).