A cutting tool comprising: a first and a second blade pivotally attached to each other via a joint, a first handle attached to the first blade and a second handle attached to the second blade for pivoting the blades (2, 3) in relation to each other around said joint, at least a first threaded part whose rotation in relation to a threaded counterpart tightens or loosens the joint depending on the direction of the rotation, a movable locking element for preventing the first threaded part from rotating in relation to the movable locking element, the movable locking element being engaged with at least one of the first handle and the first blade, and a hole in the first handle for receiving the movable locking element characterized in that a spring element is arranged between the first blade and the first handle to contact the movable locking element, in order for the first threaded part to rotate around the joint with the first handle and the first blade, the movable locking element comprises a first intermeshing surface which due to a force generated by a spring element is pressed against a second intermeshing surface in the first threaded part for preventing the first threaded part from rotating in relation to the movable locking element, and the movable locking element further comprises a push-button area for directing a force towards the movable locking element for moving the movable locking element with the first intermeshing surface away from the second intermeshing surface of the first threaded part in order to allow the first threaded part to rotate in relation to the movable locking element. a first and a second blade pivotally attached to each other via a joint, a first handle attached to the first blade and a second handle attached to the second blade for pivoting the blades (2, 3) in relation to each other around said joint, at least a first threaded part whose rotation in relation to a threaded counterpart tightens or loosens the joint depending on the direction of the rotation, a movable locking element for preventing the first threaded part from rotating in relation to the movable locking element, the movable locking element being engaged with at least one of the first handle and the first blade, and a hole in the first handle for receiving the movable locking element characterized in that a spring element is arranged between the first blade and the first handle to contact the movable locking element, in order for the first threaded part to rotate around the joint with the first handle and the first blade, the movable locking element comprises a first intermeshing surface which due to a force generated by a spring element is pressed against a second intermeshing surface in the first threaded part for preventing the first threaded part from rotating in relation to the movable locking element, and the movable locking element further comprises a push-button area for directing a force towards the movable locking element for moving the movable locking element with the first intermeshing surface away from the second intermeshing surface of the first threaded part in order to allow the first threaded part to rotate in relation to the movable locking element.