Door Window Lock Restrictor with Key Window Cable Limit Lock Adjustable Portable Alloy Security for Bedroom and OfficeFeatures: Without further installation tools, it can be easily utilized in most environments; air circulation can be progressed by way of conserving home windows in part open and closed, whereas preventing youngsters from mountain climbing and falling out of windows. Specifications: Material: Aluminum alloy Scope of application: screens Size: (A)30*25*25mm/1.18*0.98*0.98",(B)60*25*25mm/2.36*0.98*0.98" Notes: Due to the several display screen and light effect, the actual shade of the article might be barely diverse from the color confirmed on the pictures. Thank you! Please allow 1-3mm measuring deviation because of manual measurement.