Make of stainless steel,which is resistant and.Ergonomically and comfortably in the hand. Equipped with a and a.The locking of window effectively prevents theft. They can be quickly installed in just a few simple step and are stable and dependable after installation. Parent can control the opening and closing authority of window,effectively from accidentally opening window. It can be used in homes,bathrooms,offices,hotel and other place to effectively secure window,balcony door,patios door.