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″.

Insize HDT-RSR100, MANUAL ROCKWELL AND SUPERFICIAL ROCKWELL HARDNESS TESTER, 6940561933987
3M 22405, Roloc Disc 361F, P100 YF-weight, TR, 3 in, Die R300V, 7000045102
Dynabrade 95677 1/4" Male Plug with 1/4" NPT Female Thread
3M 04229, Scotch-Brite Hand Pad 7447B, HP-HP, A/O Very Fine, 6 in x 9 in, 7000027560, 60 ea/Case
Dynabrade 96101 Dynabrade Air Lube 10W/NR 24 Per Box 