The Strike Locator is used to mark a door jamb for proper installation. After a 1” inch edge bore is drilled, insert the Strike Locator, close the door, put pressure on the punch and the sharp center of the tool marks the frame where to drill for proper latch or deadbolt alignment. The Strike Locator is used to mark a door jamb for proper installation. After a 1” inch edge bore is drilled, insert the Strike Locator, close the door, put pressure on the punch and the sharp center of the tool marks the frame where to drill for proper latch or deadbolt alignment.