Lock-it Block-it 30 in. High-Impact Plastic White Security Burglar Bar and Secondary Window Lock (2-Pack)

The Lock-it Block-it is an adjustable Home Security burglar bar for windows. This burglar proof and childproof device is designed to keep windows OPEN at a safe height and SECURED. Block criminals from climbing in through open windows and children from falls. The device physically blocks Single Hung Windows, Sliding Windows and Patio Doors. Intruders can't reach when properly installed and adjusted. Children can't reach it (when furniture isn't near the window). Used as a secondary window lock for closed windows. Adjustable - extends from 17 in. to a maximum of 2 ft. 6 in. long. The device sits in the window track with the head wedged into top corner of the window making it impossible to move. Supplied adhesive strips hold the device firmly in place. When the window is lowered, the device doesn't fall out. Made of two high-impact strength PLASTIC cylinders for a combined thickness of two nickels. Cylinders are locked together by a double-headed push pin. Rubber end caps for scratch protection. 13 adjustable settings allow for windows to be Locked Open from 1 in. or more. Its smooth white finish blends in with the window and doesn't block the view. No tools required. IMPORTANT - MEASURE before buying - (1) Device will not fit in tracks narrower than 1 in. wide. (2) The device extends maximum of 2 ft. and 1/2 ft. (3) Fits windows and patio doors 3.5 ft. - 6 ft. high or wide. (4) Not suitable for double-hung windows if the purpose is to prevent burglaries.