Abstract: A readjustable pair of pliers for mounting circlips has a handle which with the aid of a sidewardly bent attachment part is pivotally connected to an intermediate member carrying a jaw with an engagement pin. A second jaw carrying an engagement pin is rigidly connected with a second handle defining therewith a rigid unit to which said intermediate member is pivotally attached. The attachment part is defined by a parallelepipedic block tightly fitting in a corresponding groove in the intermediate member. By swinging the second handle through 180.degree. relative the intermediate member the mode of operation of the pair of pliers is altered in dependence on if a circlip for inner or for outer mounting has to be served.