The Reliabilt 28"-48" Adjustable Aluminum Sliding Patio Door Security Bar U 9921-L is an aftermarket security bar designed for direct replacement on patio doors. Made of durable aluminum, this white security bar is adjustable in length from 28" to 48" to fit various door sizes. The security bar comes with fixings supplied for easy installation. It also features a California Prop 65 warning due to its material composition. This security bar provides added safety and peace of mind so no one can get in that sliding door unless they actually break the glass. Which would be so loud. With out the bar you can actually lift the patio door off the tract and remove it if it’s not tightened so tight that there is no play to remove it. They usually loosen over time. The bar will last forever
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