Standard Abrasives 709907, A/O Straight Cartridge Roll, 1/4 in x 1-1/2 in x 1/8 in 120, 7100080014 
Insize 7382-12, 3-WIRES, .0077″/0.195mm, 6928640361715
$321.46
Used with standard outside micrometers with spindle .25″DIA to measure pitch diameter of screw threads.
Diameter accuracy: ?20_in. Cylindricity: 39_in.
Hardness: HRC60.
Supplied with manufacturer inspection certificate.
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