Conform to Dimensions in inches
BS 122 Part 1 : 1989

Milling Cutters (Shank Type) - Parallel Shank Slot Drill (Parallel Shank Slot Drill)
Diameter Cutting Edge Length Overall Length Shank Diameter
1/8 3/8 1.7/8 1/4
5/32 3/8 1.7/8 1/4
3/16 1/2 2 1/4
7/32 1/2 2 1/4
1/4 5/8 2.1/8 1/4
5/16 3/4 2.1/2 3/8
3/8 7/8 2.5/8 3/8
7/16 7/8 2.5/8 1/2
1/2 1 2.3/4 1/2
9/16 1.1/8 2.7/8 1/2
5/8 1.1/4 3.1/4 5/8
11/16 1.3/8 3.3/8 5/8
3/4 1.1/2 3.1/2 5/8
7/8 1.5/8 3.5/8 3/4
1 1.3/4 3.3/4 3/4
1.1/8 1.7/8 4.1/8 1
1.1/4 2 4.1/4 1
1.3/8 2.1/8 4.5/8 1
1.1/2 2.1/4 4.3/4 1