a vice device consisting of a frame containing a fixed jaw and a rack , the rack being placed in a plane perpendicular to the fixed jaw ; and a mobile jaw , containing a body and a jaw mobile in movement compared to the body . the jaw is mobile in movement parallel to the rack with the possibility of locking onto the rack by means of a rack mobile in the body equipped with notches at its end opposite the rack and biased in the direction of rack by at least one spring and maneuverable by a lever connected to the body . the end of the body connected to the lever being linked to a cam which leans on the posterior part of the mobile jaw in order to allow the spreading of the mobile jaw compared to the body in the direction of the fixed jaw .