Abstract: The pincers comprise a gripping head (1) and a control device (2). The control device (2) contains a direct-current electric motor (12-13) which is supplied, through a control circuit (38), from a current-feed source (39). In addition, it comprises a commutable system of permanent magnets. The rotor (12) of the motor is integrally locked to an axle (11) which is capable of actuating the gripping head (1), which is installed in the body of the control device (2), and which is displaceable axially between two positions. The stator (13) is installed in such a way as to be free to revolve between two limiting angular positions and is integrally locked to a first part (27-28) of the commutable system of permanent magnets, which is integrally locked to a support (15) of the axle (11). The second part (29-30) is integrally locked to the body of the control device (2). These two parts are attracted to each other when the stator (13) is occupying its first angular position.