Standard product code key

example:

F8620.10.V10/9,8.80.20/40.Z4

F8620. - type (group)
10. - cutting diameter
V10/9,8. - shank (V10 cylindrical, W10 weldon flat) / neck diameter
80. total length (L1)
20/40. cutting length (L2) / reach length (L3)
Z4 - teeth number