The Master Lock 270D: Adjustable Hinged and Sliding Door Security Bar makes it easier than ever to feel safe in any location. With twice the strength of our standard door bar, this compact door jammer is adjustable and protects hinged, sliding, patio and hotel doors. A security bar for sliding glass doors is an excellent way to bolster security on any property, as well as first-floor apartments. Also perfect for traveling and fitting in your luggage or storing at home, this door stopper/security bar has a padded rubber foot to hold against pressure and prevent damage to floors. The quick-release design makes it easy and fast to install and adjusts to the required length of each door, from 25-1/2 in. to 43-1/2 in. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.