for angle-of-rotation controlled bolt tightening, with fixed reading point, accurate reading from any point of view, through double-sided sloping scale with unscrewable magnet, for use with a socket with 1/2'' connection, can be used with a torque wrench, e.g. Service MANOSKOP® No. 730N, as when tightening bolts with a rotation angle, a prescribed torque must first be tightened, a torque wrench whose capacity is both the prescribed torque and covers the pulling force required to achieve the angle of rotation