Sr. No.

Diameter  mm

Model  Numbers

1

Internal Standard Tools

5 To 10.5

IH 500 To 1050

2

11 To 16.5

IH/IB 1100 To 1650

3

17 To 26

IH/IB 1700 To 2600

4

27 To 36

IH/IB 2700 To 3600

5

37 To 48

IH/IB 3700 To 4800

6

49 To 64

IH/IB 4900 To 6400

7

65 To 84 

IH/IB 6500 To 8400

8

85 To 104

IH/IB 8500 To 10400

9

105 To 124

IH/IB 10500 To 12400

10

Internal Compact Tools

27 To 40

J/JB 2700 To 4000

11

--- " --- 

41 To 64

J/JB 4100 To 6400

12

External Tools for Shafts

2 To 15.5

EH/EB 200 To 1550

13

16 To 30

EH/EB 1600 To 3000

14

31 To 47

EH/EB 3100 To 4700

15

47.6 To 64

EH/EB 4760 To 6400