Features:OOTDTY High Quality Material: Made of stainless steel, it is sturdy and durable.No Punching: Each lock is supplied with a for key, flip the for key slowly during the hole, only deserve to control with the for key, no further installation instruments are required.Width controllable: Freely control the window width to prevent youth or pets from mountaineering out of the window.Must-Have Items: Secure forSuitable for families, hotels, schools, kindergartens,Specifications:Material: Stainless steelSize: Approx. 66x35x31mm/2.60x1.38x1.22inchPackage Includes:2x Window Safety Lock(with for Key)Note:Please allow 1-2cm mistakes due to guide measurement, make sure that you do not mind before you order. Due to the difference between diverse monitors, the image might not reflect the actual color of the item.