Accurate Tape Measure?

[C_Bubba]

The movement of the hook is to have an accurate measurement of both ID and OD or length measurements. The movement is about the thickness of the hook.

[Tenson]

The movement of the hook is to have an accurate measurement of both ID and OD or length measurements. The movement is about the thickness of the hook.

Ahh I see, but still can anyone recommend an accurate item, rather than one where the movement is only about right?