PUXI Adjustable Window Security Bars, Window Locks Bars Inside for Prevent Burglary for Single Hung Windows or Narrow Patio Doors, Extend from 16-3/8" to 29-1/2"

The window locks security can withstand repeated impacts on forced entry, effectively stopping burglars from entering home through sliding glass windows or patio doors. The window guards for children can also prevent children from falling from the open windows, ensuring the safety of children/family. The window safety guards for home security offers 12 adjustable lengths for you to control the window, just push the pin to lock the height in place, the length of the window stopper can be extended from 16.3"" to 29.3"", fits most standard window tracks. Installation instructions: 1、For horizontal sliding windows, you can tape the window lock safety strip directly to the window frame, which will prevent the window from being opened; if you have a taller window, you can tape another window lock safety strip to the top of the window frame, which will balance the top and bottom. 2、For vertical windows, you can tape the end of the window stopper that has a protruding part, and then let the window lock safety bar stick to the top edge position of the window frame; to prevent the window stopper from falling, it is recommended that you tape the back of the window lock safety bar as well, and then stick the window lock safety bar to the window frame on one side of the window. If you have a long window, you can tape the window lock safety strip to both sides of the window frame for left-right balance. Note:Please measured your window or door track before purchasing! The window blocker security is 1 inch wide so that make sure your window or door track must be at least 1 inch wide.