Features: Premium steel construction ensures corrosion and oxidation resistance, enhancing security for aluminum door with a multiple layer not theft mechanism. Specifically engineered for smooth compatibility with 8535/8520/8530 series door , featuring tool without installation and accuracy alignment for easy setups . Ideal for homeowners and property managers search strong , tamper resistant locking solution for residential or commercial aluminum framed entry systems. Perfectly safeguards patioes door , balcony access , and main entrances against forced entry attempts in diverse weather conditions. Combines grade steel components with reinforced deadbolts technology, delivering durability and peace for modern security demands. Specifications: Material: steel+aluminum Type: multiple for option Package Includes: 1xDoor Lock note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.