Security Window Auxiliary Security akindou Sash Window Lock Stopper Auxiliary Lock Usable for Screen Doors Anti-theft No screw marks on the sash Thank you for viewing. There are 3 in stock. Please consult if needed. ^ - ^ Description excerpt An auxiliary lock that can lock sash windows as a spare in addition to the main locking, installed on the sash window rail. It is an anti-theft product. It is sturdy and can only be unlocked with a special hex key, which greatly enhances the anti-theft effect. Also, even if you accidentally forget to lock the window, you can lock the window as a spare, so you can also expect the effect of preventing children from falling out of the window. The feature of this product is that it can fix the sash window. As an application, there is no need to worry about pets or children accidentally going outside when the window is fixed with the window slightly open for ventilation. It is also very convenient because it can lock the screen door. It is made of stainless steel that is resistant to wind and rain, direct sunlight, and rust, and is very sturdy. When attaching it to the sash window rail, there is a protective grip on the stopper part that does not scratch the rail, so there are no tightening scratches. It is also very convenient because it can lock the screen door. It is made of stainless steel that is resistant to wind and rain, direct sunlight, and rust, and is very sturdy. When attaching it to the sash window rail, there is a protective grip on the stopper part that does not scratch the rail, so there are no tightening scratches. Fixed to the sash with the included key. No other tools are required. Since it is tightened little by little with the application of screws, it does not require force and can be easily installed even by women. Size (approx.): Length 67mm x Width 36mm x Thickness 16mm (1 piece) Minimum adjustable distance: 13mm Maximum adjustable distance: 61mm Material: Stainless steel, rubber, plastic, etc. *Please check the detailed product size in the image.