National Hardware 3" Non-Mortise Panel Hinge (2 Count) is a high-quality hinge designed specifically for bi-fold doors that are at least 1 inch thick. This 3-inch non-mortise hinge features a non-removable tight, non-rising pin, ensuring durability and secure operation. Its surface mount design means that no mortising is required, making installation quick and easy. I for enhancing the functionality and appearance of your doors, this hinge combines strength and convenience in one reliable product. Model Number: N146-951