2-In-1 security bar & sliding door jammer: use this Device for two different purposes with easy interchangeable caps for hinged doors and sliding door/window Security bar (2 Pack): angled rubber bottom that assures full contact and strong grip on all types of floors without scratching them Adjustable and durable: bar can be adjusted between 22. 25"-43. 7" And constructed of high grade iron to withstand 350 pounds of pressure please note: The sliding door Caps decrease the maximum length to 39. 25"