STURDY DESIGN - This sliding door security bar is constructed of high grade iron to withstand 400 pounds of pressure. Pivoting ball joint ensures door stopper has full contact with the floor and padded foot provides a strong grip without scratching,2-IN-1 DOOR STOPPER SECURITY BAR : Use this device for two different purposes with easily interchangeable caps for hinged doors and sliding door/window. The door security bar adjusts from 28 inch - 45 inch for application flexibility,EASY TO USE - It’s fairly simple to use - just wedge it at an angle under the door knob and it helps stop the door from being opened from the outside. Simply adjust the bar length using the release button, prop under door knob and easily adjusted as needed,ABSOLUTE SAFETY - Door stopper security bar is intended for indoor use. Door security bar design is portable and compact, ideal for travel, providing enhanced security in hotels or on vacation,SATISFACTION GUARANTEE:If you have any dissatisfaction with our products, please do not hesitate to contact us. We will do our best to serve you