This Is A Satin Nickel Self-Closing Door Hinge That Measures 3 5/8 Inches By 3 The door hinges have a self-closing mechanism with a radius of 5/8 inches and are constructed with durable steel. They are specifically designed to be mounted on doors that are 1-3/8 inches thick. Make sure the door doesn't hit you as you leave! Additionally, our hinges that close automatically ensure the door closes smoothly without making a loud slamming noise. The self-closing hinges have an adjustable spring tension that allows you to choose whether the door stays closed or slightly open. This is beneficial for individuals who frequently forget to close the door. The door hinges are perfect for bedroom, bathroom, garage, basement, back door, kitchen, pantry, office, and other doors in residential or commercial doors. The pack includes three(3) self-closing door hinges and all necessary mounting hardware. Detailed instructions for installation are provided and the product is supported by a 1-year limited warranty from PTSOC.