Shears with tensioner and dynamometer device represented by a novel solution in terms of a multi functional pliers type tool for adjusting products of the clamp type in which these pliers are provided with functions of application tensioning and cutting/finishing and in order to obtain better ergonomic conditions for the use of the pliers a novel device for tensioning the metal clamp (2) has been devised which is composed of a spindle (C) on which is mounted a carriage component with traction pin (E) for the segment (2b) of the metal clamp (2) the carriage sliding along the threaded longitudinal shaft (C1) which in turn has mounted thereon an anatomical rotatable handle (D) wherein furthermore a novel device for cutting the segment of the metal clamp is claimed composed of a pair of cutting blades (b7) and (a7) one such blade at one of the ends of each lever namely the first lever (B) and the second lever (A) and in particular where the access snout (B6) of the first lever (B) and the slot (A3) of the second lever (A) respectively are defined the shears in addition including the introduction of the novel device (F) and (G) that indicates the tension applied by the metal clamp on the bone structure which is particularly useful when the patient is suffering from osteoporosis and lastly the necessary safety blocking device (H) is introduced which prevents actuation of the device for cutting the excess segment of the metal clamp (2).