Set of 2 Adjustable Sliding Patio Door Security Bar Set of 2 Adjustable Sliding Patio Door Security Bar. Add that extra level of security to any entrance of your home. Adjustable, metal bars prevent windows and sliding doors from being opened from the outside by intru Just place the bar between the sliding portion of your door or window and the frame and you can rest Adjustable length 25-1/4-Inch to 47-1/2-Inch