3-in-1 Door Security Bar, Security Door Stoppers & Door Barricade Heavy Duty Adjustable Iron Security Lock Bar for Home Defense, Apartment & Travel Safety (2 Pack - White)

Three-in-one Door Stopper Security Bar and Sliding Glass Door
Security Bar: Use this device for two different purposes with easily interchangeable caps for hinged doors and sliding doors or windows.
Adjustable and Durable: This door security bar can be adjusted from inside between 18.25" and 47.50". It is constructed of high-grade iron and can withstand 400 pounds of pressure.
Please note: The sliding glass door lock caps reduce the maximum length to 46.50".
Security Door Stoppers: The angled rubber bottom ensures full contact and provides a strong brace on all types of floors without scratching them. It also fits all door knob types, including French doors.
Easy to Use: Easily place it under a door knob and remove it when needed. The security burglar bar can also be easily adjusted for use as a sliding door lock