Feature:1. DURABLE DESIGN: These lock bars are made of excellent alloy steel metal. The heavy steel rod and non slip base are strong enough not to break and can hold up to 400 pounds. Such a strong door safety bar can provide you with safety2. SLIDING DOOR SECURITY: Door security bars prevent intruders from breaking into your home, apartment or even hotel room, which also prevent others from disturbing you and can greatly ensure your safety3. FLEXIBLE AND ADJUSTABLE LENGTH: Safety bars are made of high grade alloy steel can be extended from 20inches to 52inches long. Adjustable length and angle allow the lock bar to be installed in different positions4. EASY TO USE: This lock bar is designed for single men and women. Simple and easy to operate. You can simply place the Y shaped head on the door handle and touch the bottom to the ground so that the door rod, ground, and door plane form a solid triangular structure5. MULTI FUNCTION AND VERSATILE: The door safety bar is not only suitable for all types of doors, but also for windowsills. The rubber non slip base provides adequate resistance to smooth or rough surfaces, also can buy you time to survive in an emergencySpecification:Item Type: Door Security BarMaterial: Alloy steel.Package List:1 x Door Security Bar1 x User Manual