Ideal Security BK111W Window or Patio Door Security Bar with Child-Proof Lock, Adjustable, White, Pack Size 1

Adjustable and Easy to Install: Made of aluminium, this window or sliding door lock easily slides from 15.7 to 26.75 inches and can be installed on narrow patio doors and vertical or horizontal hung windows without cutting; allows the door or window to partially open while being secured
Perfect For Window & Pet-Door Installation: Install in-window air conditioner units, pet doors, or leave the window open for ventilation, all while locking your window or door in a secure position
Comfortable Height: This window lock mounts anywhere in the window profile, allowing you to install it out of the reach of children.The sturdy mounting bar adds a visual deterrent, making would-be thieves turn back when they see it blocking the window
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