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 78579 1/4" Dia. x 1" W x 1/8" Center Hole, 60 Grit, 100/pack
3M 64803, Scotch-Brite EXL Unitized Mounted Point, W163 x 1/8 in 8A CRS, 3M 7010329842
Norton 66261126299 - 2" X 50 Yard 80 Grit Metalite™ Aluminum Oxide Cloth Roll, 1 Each
3M 26171, PPS Series 2.0 12-Pack Refill Kit, Midi (13.5 fl oz, 400mL), 200 Micron Filter, 7100166280
Dynabrade 78176 2" Dia. Medium NWN VT DynaBrite TR Locking-Type Disc, 25/pack 
