The invention refers to a pen with a barrel and an applicator, in which the barrel has a depression for gripping and the applicator has a contour that is not rotationally symmetrical with reference to a longitudinal axis of the pen and may be adjusted around the longitudinal axis in the direction of rotation with reference to the depression for gripping. According to the invention a screw connection is provided for locking the applicator in the axial direction and/or in the direction of rotation.