Hardware Essentials Adjustable Spring Door Hinges are designed for lightweight doors where self-closing is needed. The self-closing spring tension is factory pre-set and door hinges are adjustable to control closing speed as needed. Our door hinges are full surface mounted for easy installation, simply attach one leaf to the face of the door and the other side to the door frame. Each package includes: 2 zinc-plated hinges, mounting hardware, tension adjusting tools and installation instructions. Tools required: a pencil, power drill, 1/8” drill bit and screwdriver. Hinges are available in a variety of sizes and finishes.