Butterfly Mortise Lock, Antique Copper, Case Size: 3-7/8" high x 3-1/4" deep. Backset: 2-3/8", Spacing (distance between center of doorknob hole and center of round part of keyhole) is 2-1/4". Lock face is 5-5/8" x 1". Solid cast brass faceplate, powder coated brass lock case. Solid cast parts, made to last like the old ones. Accommodates any 5/16" square spindle doorknob pair, such as all of our reproduction knobs and most of our vintage knobs. Set includes strike plate and 2 keys.