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 11004 Dynafile Screw-In Housing
3M 16353, Test Hood FT-14, 7000051788, 10 ea/Case
Dynabrade 11518 Rubber Drive Wheel
Dynabrade 07109 Vane Set (5pk)
Dynabrade 55204 Vane Set (4pk) 