The setting of a pendulum clock is usually best done by turning the minute hand forward, several revolutions if necessary, to bring the hour hand to the correct hour. If the clock does not have a striking mechanism, the hour hand, which is usually held on its slightly conical shaft by friction, may be moved forward a sufficient number of hours, and the minute hand adjusted to the correct minute. As the hour hand may have become loosened on its shaft by this procedure, however, it should be pressed tightly into place after it is set correctly. In some clocks with a striking mechanism, the minute hand should not be moved backward across a striking point, although it can, without injury, be moved back short distances in other parts of the dial to set it correctly.