Childproof Anti-Lift Lock *Quick and Trouble-Free Installation *For Most Patio Doors and Gliding Windows Refined Lightweight Designed with Strong Extruded Aluminum Material of Aerospace Industry. Adjustable Length from 25.75 to 47.5 inch for Easy Switching Without Cutting, Perfectly Suitable Either the Door is Closed or Partially Open. Mounts in the Bottom of the Door, Acts as Hidden Against Burglars to Find the Bar out and Try to Destroy it. Defend your Patio Doors to Prevent Burglar and Intruder Reinforce Your Home's Security and Gives Your Family Extra Peace of Mind.
