Abstract: The pliers form a cable wire testing tool. At the front end of a working portion (11a), a blade-type piercing member (18) is adapted to leave, in closed condition of the pliers, a free space relative to a surface of the other leg (12) serving as an abutment (17). In use, a cable wire is placed between the working portion (11a, 12a) of the pliers. Upon compressing the legs, the piercing member (18) penetrates the cable sheathing to establish with its point the electric contact between the cable core and the pliers' leg (11) which is provided with a connecting member (20) for the connection of a test cable (22). Due to the cable wire testing pliers, the customary stripping and securing of terminals may be avoided for testing cable wires.

Abstract: A rotatable tool which includes a pick carrier having a recess which receives one end of a rod-shaped support secured thereto, an opposite end of the rod-shaped support as a right-cylindrical bore opening axially outwardly of an end face thereof, a pick bit is formed by a shaft having a right-cylindrical bore and a bit-end, and the shaft is received in a split sleeve which in turn is received in the bore to press-fit the bit in the bore.

Abstract: The pliers include a pair of arms each having a front operating leg and a rear handle leg, a hole in each arm between the front operating and rear handle legs, a bolt extending through the holes for pivotally connecting the arms to each other, the bolt having a head at one end and a threaded portion at its opposite end upon which is rotatably threaded a nut, and the nut and one of the pair of arms or a plate sandwiched between the nut and one of the pair of arms is provided with at least one interengaged tooth and tooth gap which prevents the nut from rotating relative to the last-mentioned arm which is additionally preferably nonrotatably secured to the bolt.

Abstract: The hand-operated ratchet spanner contains a measuring value pick-up (4,9) for the angle of rotation of the screw and a device for measuring the torque. The measured values are supplied to a microprocessor (22) in which the screw tightening operation is preprogrammed by respective desired or limit values. Signal lamps (30,31,32) or acoustic signal transmitters (33) indicate to the user as to whether the screw has been correctly tightened. Further, he may recognize the extent to which the screw has been tightened and which part of the tightening operation must be still effected.