【Window Security Measures】 This product is a guard that is attached to windows to prevent intrusion from the outside. It is especially useful in preventing malicious intruders. 【Easy Installation】 It can be easily installed without tools, and the installation range is approximately 28-42mm. You can easily strengthen your security measures. 【Reliable Design】 With a solid design, you can use it with peace of mind even when the window is closed. Also selling a set of 7. Product Name: NEW Window Stopper Purpose: Window security measures Installation Range: Approximately 28-42mm Product Size: Approximately 60mm (height) x 40mm (width) x 37mm (thickness) Material: Zinc alloy, iron, rubber Easy installation without tools Both items are new and unused. I planned to use one of them after removing the package, but I didn't end up using it. Although there is no package, it is new. Please refrain from purchasing if you are concerned. No. 8443 NEW Window Stopper Installing it at the top and bottom of the window further enhances security! Install it on the window to prevent malicious intrusion! Inner sash, outer sash, window frame, knob Installation Method Simply insert this product into the groove of the window frame and secure it firmly! Stopper Adjust the width of the stopper while turning the knob. Installation Range Approximately 28~42mm Narrow the width Widen the width Usage Precautions / CAUTION 【Material】 Zinc alloy, iron, rubber No. 57