Heavy-Duty and Durable: Made with high-quality iron and electroplating coatings, our hinges are tough enough to hold a variety of doors, including wood, metal, interior, exterior, residential, and commercial doors. Easy to Install and Adjust: With 5/8' radius corners and a thickness of 2.7mm, our hinges are easy to install and come with a hex wrench for easy adjustments to the closing speed. Complete Package: Each box includes 2 hinges and 32 screws in the same color as the hinge, making it easy to upgrade your doors with a cohesive look. Upgrade Your Doors: Upgrade your doors with our self-closing spring hinges and enjoy the benefits of a more secure and functional door.