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 96101 Dynabrade Air Lube 10W/NR 24 Per Box
Dynabrade 40610 Electric Dynafile II Abrasive Belt Tool
3M 15041, Scotch Electrical Shielding Tape 24, 1 in x 15 ft (25 mm x 4,6 m), 7000031348
Dynabrade 15420 Dynafile III Abrasive Belt Tool
Insize 4120-18N, METRIC THREAD RING GAGE, NO GO, M18x2.5, 6928640341816 