For zero setting of inside micrometers, three points internal micrometers and bore gages.
Deviation is the difference between the ordered size and the size marked on the setting ring when supplied.
For example, the ordered size is .2”, the size marked on the setting ring when supplied may be .20008″.
setting ring when supplied may be .20008″.

Dynabrade 01480 Vane Set (4pk)
Insize 6300, MICROMETER STAND, 6928640307294
Dynabrade 11518 Rubber Drive Wheel
Dynabrade 18426 Vane Set (4pk) 