The shot is a moving mechanism in deadbolt locks that ensures the door is closed. Shotguns can be single-sided (for doors that open only one way) or double-sided (for doors that open both ways), with or without a gear (they have a mechanical system - a gear) that makes it easier to operate the lock) and are a key element for door security. The choice of the right type of lock depends on the type of door, the direction of opening and the desired level of security.