Only for Inswinging Doors with 3mm / 1/4" Clearance – The DoorJammer is a super strong portable door security device that quickly prevents unwanted entry in seconds, boasting police accreditation and award-winning design. The patented steel design works on almost any in swinging door even without a lock or handle, ensuring reliable security wherever you are. It takes just moments to fit in the gap under an inward opening door without the need for tools or permanent modifications. The DJ3’s patented design uses displacement of force to barricade the door against an attempt at forced entry. Tried & Tested – The DoorJammer has undergone extensive impact and durability testing, including the reputable PAS24 Impact Test. Compact & Lightweight – Weighing just 210g/0.46lbs and with dimensions of 108mm/4.25” x 40mm/1.57” x 70mm/2.76”, DoorJammer is the original portable security solution, fitting easily into your bag or pocket. Help ensure privacy on the go or at home with DoorJammer, providing peace of mind wherever you need it. Quick Setup & Release – Takes only seconds to install and remove. No tools are required to implement this revolutionary portable security device. In case of emergency, the unique design enables a quick-release function that easily removes the DoorJammer with an upward motion. Highly Versatile – Compatible with all types of flooring, the innovative system of hinges and angles anchor the DoorJammer firmly to carpeted, tiled and laminated floors when outside pressure is exerted on the door. The DoorJammer must be installed on a flat surface., Weight: 0.4629707502 Pounds, Manufacturer: Penn-Elcom