Support designed to connect to a clamp in an external fixation system, and kit for use in an external fixation system.A support designed having a locking mechanism includes an elongated member having a distal end, a proximal end, and a threaded portion near the distal end a state associated with the mobile mode operable state is elongated, and a sliding lock associated Method of the state cabinet.The threaded portion may have at least one flat side and the slide lock may have at least a portion flat. The at least one flat side and at least a portion flat can pick up so that the lock slide translate along, but does not rotate around the portion rosqucada. The lock slide can pick up a surface of the clamp.The mobile member can move the lock for sliding in the direction of the clamp to the coupling portion on the surface of the clamp. The connection between the coupling portion and the surface of the clamp can prevent the lock slide to rotate in relation to the clamp.