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 11475 Dynabelter Abrasive Belt Tool, Standard Duty
Dynabrade 40320 Dynafile II Abrasive Belt Tool
Dynabrade 94991 1/4" Female Composite-Style Coupler with 1/4" Female Plug Assembly
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916
Insize 4120-2, METRIC THREAD RING GAGE, GO, M2x0.4, 6928640341342 