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 6300, MICROMETER STAND, 6928640307294
Dynabrade 77758 4-1/2" Dia. x 7/8" Center Hole, 60 Grit, Z/A, Type 27, DynaCut Flap Disc W/Fiberglass, 10/pack
Dynabrade 77774 5" Dia. x 7/8" Center Hole, 80 Grit, Type 27, Ceramic DynaCut Flap Disc, 10/pack
3M 26141, PPS Series 2.0 Adapter, Type S44, 3/8 Female, 19 Thread BSP, 7100158892
Standard Abrasives 530205, A/O Resin Fiber Disc, 7 in x 7/8 in 60, 7010310605 