3M 45097, Roloc Disc Pad TR, Extra Hard 2 in 1/4-20 Internal, 7000045284 
Insize 7110-500, STEEL RULE, 20″/500mm, 6928640319808
$15.31
Graduation: 1/64″, 1/32″, 1/16, 0.5mm, 1mm.
Rigid rules
Made of stainless steel.
Non-glare surface.
Related products
General Use Tapes
3M 06536, Scotch Steel Gray Masking Paper, 06536, 36 in x 1000 ft, 1 per case, 7000045443
$291.43
Measuring/ Inspection Instruments
Insize 4102-181, STEEL GAGE BLOCK SET, 81pcs, grade AS-1, 6928640329906
$704.69