General description The CSPARKV 4Pcs Door Screw-in Hinge is designed for both home and commercial use, providing a sturdy and elegant solution for various door types. Made from high-quality zinc alloy, these hinges are resistant to rust and corrosion, ensuring durability and longevity. With a maximum opening angle of 90 degrees and a removable inner hinge rotation of 180 degrees, they prevent unwanted door movement while enhancing the aesthetic of your space. Technical specifications Material: Zinc alloy Load-bearing capacity: Up to 40 kg Maximum opening angle: 90 degrees Rotation angle of removable inner hinge: 180 degrees Installation Easy assembly with included 4 renovation hinges Can be installed on various types of wooden or metal doors No need to separate door alignment during installation Usage Suitable for fixing bedroom doors, entrance doors, garden doors, fire doors, and furniture doors Applicable for both private and commercial settings Can be used indoors and outdoors