Each set of specifications is divided into 8 pieces, numbered 1-8, respectively
Represents the range of teeth it can process:
1 #: 12-13 teeth
2 #: 14-16 teeth
3 #: 17-20 teeth
4 #: 21-25 teeth
5 #: 26-34 teeth
6 #: 34-54 teeth
7 #: 55-134 teeth
8 #: 135