Marks 21AC Double Cylinder Knob,

Iron Gate/Door Lock
Right hand /Reversible
2-1/2" Backset (distance between keyhole till end of door)
Face Plate: 1" x 7-1/8"
Satin Chrome Finish

Marks 21AC Double Cylinder Iron Gate Ornamental Knob Plate Mortise Lock Set With 2-1/2" Backset, 1" X 7-1/8", 1" deadbolt, Satin Chrome finish, thru-bolted.