An assembly for a drug delivery device comprising: a housing; a lead screw having a distal end and a proximal end, the lead screw including a threaded shaft; a drive nut threadedly engaged with and screwable along the threaded shaft during dose setting; a dial link, the dial link being axially movable and rotatably fixed relative to the drive nut, the dial link having a first clutch component (80, 81); a number sleeve; and a dose knob comprising a second clutch component (82, 83) cooperatively engagable with the first clutch component, wherein, when the dial link and the number sleeve are in a first axial arrangement, the dial link is rotatably fixed with the number sleeve, wherein when the number sleeve and the dial link are in a second axial arrangement, the number sleeve is rotatable relative to the dial link, wherein the coupling between the number sleeve and the dial link in the respective axial arrangement is provided by a clutch, which is provided in addition to the first and second clutch components, wherein the first clutch component (80, 81) and the second clutch component (82, 83) are movable relative to each other to assume at least two different positions, a first position and a second position, wherein, in the first position, the first and second clutch component cooperate to rotatably fix the dose knob and the dial link relative to each other, wherein, in the second position, relative rotation between the dial link and the dose knob is allowed in only one rotational direction or in both rotational directions, and wherein, during dose delivery, the first clutch component (80, 81) and the second clutch component (82, 83) are in the second position. a housing; a lead screw having a distal end and a proximal end, the lead screw including a threaded shaft; a drive nut threadedly engaged with and screwable along the threaded shaft during dose setting; a dial link, the dial link being axially movable and rotatably fixed relative to the drive nut, the dial link having a first clutch component (80, 81); a number sleeve; and a dose knob comprising a second clutch component (82, 83) cooperatively engagable with the first clutch component, wherein, when the dial link and the number sleeve are in a first axial arrangement, the dial link is rotatably fixed with the number sleeve, wherein when the number sleeve and the dial link are in a second axial arrangement, the number sleeve is rotatable relative to the dial link, wherein the coupling between the number sleeve and the dial link in the respective axial arrangement is provided by a clutch, which is provided in addition to the first and second clutch components, wherein the first clutch component (80, 81) and the second clutch component (82, 83) are movable relative to each other to assume at least two different positions, a first position and a second position, wherein, in the first position, the first and second clutch component cooperate to rotatably fix the dose knob and the dial link relative to each other, wherein, in the second position, relative rotation between the dial link and the dose knob is allowed in only one rotational direction or in both rotational directions, and wherein, during dose delivery, the first clutch component (80, 81) and the second clutch component (82, 83) are in the second position.