ENHANCED HOME PROTECTION: Heavy duty, dual-function security bar prevents forced entry on hinged, patio and sliding doors; For indoor use PORTABLE AND COMPACT: Collapsible design is easy to store and ideal for travel, providing extra security in hotels, on vacation or at the office ADJUSTABLE: Adjusts from 28.5 in. (72.4cm) to 45 in. (114cm) in length to fit most standard doors and sliding patio doors; Top door knob jam is easily removed for sliding door applications (Length without door knob jam: 25 in. to 41.5 in.) DURABLE, COMMERCIAL DESIGN: Made with heavy duty 1mm, 20 gauge steel for strength and security; Pivoting ball joint ensures full contact with floor for secure fit while padded foot provides a strong grip without scratching INSTALLS IN SECONDS: No tools required, simply adjust the bar length using the release buttons, prop under door knob and easily adjusted as needed. Includes vibration detecting alarm.