The AT444 Potato Peeler is suitable for Chef models manufactured after 1976 (A901 and KM models).The AT445 Potato Peeler is suitable for Major models manufactured after 1976 (A907 and KM models). This attachment is larger than the Chef version.The model number of your Chef or Major can be found on the underside of your kitchen machine. This attachment will not fit other models of kitchen machine, such as the kMix. There is currently no potato peeler attachment available for the Chef Sense or Chef Sense XL.