Zinc. Designed for full-surface, half-surface, half-mortise, or offset application. Holes are countersunk on both sides. The pins are removable for easy door installation. Set consists of: 1 pair loose pin hinges, 3" x 2-1/2"; 1 each zinc hook and eye, 2-1/2", door pull, and 16-3/8" National Hardware spring with hooks.