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″.

Insize 4809, U.S. STAND SHEET METAL GAGE, 0-36(.3125~.0070"), 6928640330162
Dynabrade 15029 Contact Arm Ass'y, 1" Dia. x 3/8" W, Tapered Rubber Wheel, No Platen/Offset Design
3M 54109, Scotch-Brite Roloc AL Surface Conditioning Disc TR, 1-1/2 in x NH A MED, 7100075533, 200 per case
3M 64999, Cloth Belt 577F, 36 YF-weight, 2-1/2 in x 60 in, Film-lok, Single-flex, 7010308481, 50 per case
Dynabrade 94990 1/4" Female Composite-Style Coupler with 1/4" Male Plug Assembly
3M 20910, PSA Cloth Disc 348D, 60 X-weight, 2 in x NH, Die 200P, 7000118872
Dynabrade 95821 Dynabrade Air Lube 10W/NR, 4oz Bottle
3M 20907, PSA Cloth Disc 348D, P120 X-weight, 2 in x NH, Die 200P, 7000118875
3M 80756, Flap Wheel 747D, T83, 2-1/2 in x 1 in x 1/4 in, P120 X-weight, 7010327311, 10 per case 