The present invention relates to a drive mechanism which is suitable for an injection device, especially a pen type drug delivery device. The mechanism includes a housing, a dosing member which during dose setting, dose resetting and dose dispensing rotates relative to the housing between a zero dose position and a maximum dose position, and an insert that is rotationally constrained to the housing. The dosing member and the insert each include at least one abutment feature contacting each other when the dosing member reaches its zero dose position during dose dispensing, and an audible and/or tactile feedback is generated by the contact of the abutment features.