ISO 7388-1:2007 specifies the dimensions of tool shanks with a 7/24 taper, of shank forms A, AD, AF, U, UD and UF (with two possible additions for each), for automatic tool changers, used on machines having an automatic gripping system for feeding tools from the magazine to the spindle and vice-versa. These tools are designed with the most important dimensions for use in spindle noses according to ISO 9270.