General description Heavy Duty 3' Double Acting Stainless Steel Spring Hinges are designed for swing doors, providing a bidirectional pendulum hinge suitable for double opening functions, such as bar doors. These hinges are self-closing and feature adjustable resilience through a metal rod. Technical specifications Material: Stainless steel Finish: Satin Dimensions: Strip height (inner height): 78mm (3") Height: 93mm (3.66") Strip thickness: 1.5mm (0.06") Width: 70mm (2.76") Door thickness: 20-25mm Door width: less than 50cm Load capacity: 3.5-5kg (for 1 hinge) Packed in quantity of: 2 pieces (1 pair) Includes stainless steel fixing screws (size: M4 x 25mm) Installation It is recommended to install 2 hinges for a single door. For heavy and high doors, using 3 hinges is advisable.