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″.

3M 27258, Ultra Durable 5 inch Power Sanding Discs, Universal Hole, 150 grit, 7100188466, 5 per pack
3M 87052, Cubitron II Stikit Film Disc 775L, 180+, 6 in x NH, Linered w/Tab, Die 600Z, 7100075206, 250 per case
3M 20897, PSA Cloth Disc 348D, 80 X-weight, 4 in x NH, Die 400BB, 7010294664
3M 64804, Scotch-Brite EXL Unitized Mounted Point, W163 x 1/8 in 8S FIN, 3M 7010300871 