【Innovative Floor Spring Design】: This hidden pivot hinge features an advanced floor spring mechanism that eliminates the need for digging, making installation quick and easy. It is suitable for various wooden and concealed doors, providing a seamless integration into your home or office 【Versatile 90 Degree Positioning】: The unique top and bottom pivot design allows the door to be positioned freely at a 90 degree angle. This feature offers flexibility and convenience, ensuring smooth operation in any setting 【Hydraulic Buffer Technology】: Equipped with hydraulic buffer technology, this hidden pivot hinge ensures silent opening and closing of doors, effectively reducing noise compared to traditional hinges. Enjoy a peaceful environment without the disturbance of door slams. 【Concealed Aesthetic Design】: With its hidden design, this invisible door closer hidden pivot hinge maintains the elegant appearance of your doors without compromising on or functionality. It blends seamlessly into any decor while enhancing the overall aesthetic decor. 【Automatic Closing Feature】: The automatic hinge function eliminates the need for manual door closing, offering enhanced convenience in everyday use. Made from aluminum alloy material with dimensions of 19.1 cmx7.2 cm/7.52 inchx2.83 inch Specification: Material: Aluminum Alloy Size Chart: 19.1 cmx7.2 cm/7.52 inchx2.83 inch Package Includes: 1 Set Automatic Door Closer