【Lock Bolt Design, Double Safety Protection】Under the adjustable function, we have added the bolt bolt function, which makes the sill bar stronger and more indestructible. 【Anti-Slip Base】The rubber base on the bottom prevents the bar from slipping off the door or scratching the floor. The swivel round base ensures full contact with the floor for a secure fit and is effective against slipping. 【Sturdy Quality, Safe and Anti-Theft】This heavy-duty sliding door security bar is made of high-grade iron and can withstand 550 lbs of pressure. It prevents forced entry to hinged, patio and sliding doors for added home protection. 【Easy to Use】The props under the door handle are easy to disassemble, and the anti-theft lever can also be easily adjusted. Safety bars are easy to install and use is a breeze. 【Adjustable, Multi-Scenario Use】The door safety bar can be adjusted from 28\" - 45\" for application flexibility. The door safety bar is adjustable and multifunctional designed to fit most standard doors, patio sliding doors, windows, front doors, back doors, patio doors, apartments, hotel rooms and more. 【WHAT'S INCLUDED】 Your satisfaction matters, so enjoy lifetime support. Door Safety Bars (2 pcs), Door Covers (2 pcs), Sliding Patio Door Window Covers (2 pcs), User Guide.