Abstract: A lock keeper has a mounting bracket which wraps around the strike jamb on which the keeper is installed, thus enabling the keeper to be secured to the wall adjacent to the jamb by screws which extend into that wall from two directions. The bracket carries a striker plate having a bolt aperture for receiving a lock bolt projected from a door, and the striker plate is adjustable in the horizontal direction to permit precise positioning of the bolt aperture and to enable the keeper to accommodate doors of varying width.