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This is a wedge-shaped door stop made of aluminum alloy that jams under an inward-opening door to resist forced entry. Some versions add a loud alarm that sounds when the door pushes against the wedge. It needs no tools and no installation, so it suits travelers, renters and dorm or hotel guests who want a barrier they can carry. Against rival wedge alarms it trades plastic bodies for metal, but it only works on hard, flat floors and does nothing for doors that open outward.
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The Portable Door Stop Alarm & Security Lock is a travel-friendly security device for standard internal doors. It combines a door stop with an anti-theft lock. Some versions also include an audible alarm. It can be used at home, in hotels, apartments, dorms, offices and public buildings.
It is made of aluminum alloy and installs without tools. Place it under the door and adjust it for a tight fit. It works by displacing force to barricade the door against forced entry. To remove it quickly, lift it upward.
It is designed for hard, flat floors and is not suitable for carpets or similar soft flooring. Place it on a hard, flat surface directly beneath the door handle, and test the placement by trying to open the door before relying on it.