Abstract: It describes the patent of the utility model belonging to the field of products that block or prevent access to a particular area or thing, consisting of a body (1) made of anti-flame plastic, comprising a cylindrical curved metal rod (2), internally locked by two plastic tabs (3) orthogonally fitted, so that said tabs (3) are moved by a zamac trigger (4), which has a predominantly cylindrical shape, consisting of channels in the base which engage in the cylinder (5) for opening and closing located just below. Said cylinder (5) is fixed to the main body by means of a screw (6) and nut (7). The lower cover (8) of the lock is made of anti-flame plastic. The shape of the plastic tabs (3) is predominantly trapezoidal and they have a verve (9) for engaging the guide axis (10) of the trigger (4), and they have, at one end, an is inclined and curved face (11) that facilitates sliding on the recesses (12) for locking the metal rod (2).