A closure system comprising: a main body having a hollow cavity therein; a locking mechanism slidably disposed within the cavity, the locking mechanism comprising: a central post; a plurality of engagement pins connected to the central post; and an actuator at one end of the central post that extends through an opening in one end of the main body, such that pulling the actuator causes the locking mechanism to slide within the main body to reach an unlocked position, and pushing the actuator causes the locking mechanism to slide to a locked position; and a plurality of fastening elements, each fastening element having an aperture therethrough such that each fastening element is connected to the locking mechanism by inserting the fastening element into the cavity while the locking mechanism is in the unlocked position, and then and pushing the actuator to slide the locking mechanism into the locked position wherein a corresponding one of the pins extends through the aperture; wherein all of the fastening elements are released simultaneously from the locking mechanism by pulling the actuator to slide the locking mechanism from the locked position to the unlocked position, characterized by a holding element (24,25) attached to the central post of the locking mechanism below each engagement pin and being spaced from the engagement pin to allow passage of one of the fastening elements therebetween, said holding element (24,25) supporting a respective one of the fastening elements while the locking mechanism is in an unlocked position. a main body having a hollow cavity therein; a locking mechanism slidably disposed within the cavity, the locking mechanism comprising: a central post; a plurality of engagement pins connected to the central post; and an actuator at one end of the central post that extends through an opening in one end of the main body, such that pulling the actuator causes the locking mechanism to slide within the main body to reach an unlocked position, and pushing the actuator causes the locking mechanism to slide to a locked position; and a central post; a plurality of engagement pins connected to the central post; and an actuator at one end of the central post that extends through an opening in one end of the main body, such that pulling the actuator causes the locking mechanism to slide within the main body to reach an unlocked position, and pushing the actuator causes the locking mechanism to slide to a locked position; and a plurality of fastening elements, each fastening element having an aperture therethrough such that each fastening element is connected to the locking mechanism by inserting the fastening element into the cavity while the locking mechanism is in the unlocked position, and then and pushing the actuator to slide the locking mechanism into the locked position wherein a corresponding one of the pins extends through the aperture; wherein all of the fastening elements are released simultaneously from the locking mechanism by pulling the actuator to slide the locking mechanism from the locked position to the unlocked position, characterized by a holding element (24,25) attached to the central post of the locking mechanism below each engagement pin and being spaced from the engagement pin to allow passage of one of the fastening elements therebetween, said holding element (24,25) supporting a respective one of the fastening elements while the locking mechanism is in an unlocked position.