SLIDING DOOR SECURITY:Our door security bar prevents intruders from breaking into your home, apartment, or even hotel room .It also prevents other people from disturbing you,can greatly ensure your personal safety.DURABLE DESIGN:These door lock bars are made of high-quality metal. Heavy-duty steel pole and non-slip base are strong enough to not break.This strong bar can withstand 400 lbs. Such a strong door security bar can provide a guarantee for your personal safety.ADJUSTABLE LENGTH:The Security Bar made of high grade iron is expandable from 20 inches to 52 inches long.Adjustable length and angle allow the door lock bars to be installed in different places.MULTI-USE:Our door security bars are not only suitable for all kinds of doors but also for window sills.Rubber non-slip base provides enough resistance for smooth or rough ground.Can buy you time to survive in a pinch.EASY TO USE:This door lock bar is specially made for single men and women.Simple design makes it easy to use.All you have to do is hold your Y shape head on the doorknob and touch the base to the ground,let the door pole, the ground and the plane of the door form a solid triangular structure. Product Description INFLATION Adjustable Door Security Bar Rugged metal shaft and latch design 400 lbs of resistance provides a strong enough sense of security The rubber non-slip base is suitable for wood, tile cement and other floors Designed to provide security for hotels, dormitory apartments, offices and other places The door security bar is suitable for hinged roller shutters or even sliding balcony doors