The backs of most Analog Clocks feature two specially designed clock-lock hangers spaced at precise distances, one on the top and the other on the bottom. The clock-lock feature prevents accidental removal if the clock is bumped, and it may reduce theft by requiring a particular combination of moves to remove the clock.
Clocks with the clock-lock feature are supplied with two mounting screws and wall anchors. To bypass the use of the clock-lock feature, use finishing nails with no heads angled at 45 degrees into the wall in place of the supplied mounting screws.