An adjustable nut wrench comprising a handle section and a slide guided element that is pushed by a spring to a position where abutment surfaces are paralleled to two or three nut's sides. A first embodiment of the wrench comprises two paralleled abutment surfaces which set by the angle of maximal 60 degrees to a direction of the sliding element movement. A second embodiment of the wrench has three abutment surfaces located by the angle of 60 degrees to each other and one of them is sliding.