Alcance
                            ISO 235:2016 specifies the dimensions of the following three types of drills:a)    parallel shank drills, stub series;b)    parallel shank drills, jobber series;c)    Morse taper shank drills.It comprises, for each type of drill mentioned above, three tables giving, respectively:a)    the dimensions in millimetres;b)    the dimension in inches;c)    the corresponding lengths, in millimetres and in inches, set out as functions of diameter steps.