National Hardware Broad Hinge, 70 lb Weight, Door Leaf Width: 3-1/2 in, Door Leaf Thickness: 0.11 in, Frame Leaf Width: 3-1/2 in, Frame Leaf Thickness: 0.11 in, Number of Knuckles: 5, Pin Type: Removable, Loose, Pin Diameter: 0.27 in, Full Mortise Mounting, Number of Mounting Holes: 6, Mounting Hole Diameter: 0.23 in, Hole Spacing: 1.38 in, Cold Rolled Steel, Zinc, Dimensions: 3-1/2 in L x 3-1/2 in W