Used with standard outside micrometers with spindle .256″DIA to measure pitch diameter of screw threads.
Diameter accuracy: ?20_in. Cylindricity: 39_in.
Cylindricity: 1um. Hardness: HRC60.
Supplied with manufacturer inspection certificate.
Supplied with manufacturer inspection certificate.

Dynabrade 15006 Mini-Dynafile II Abrasive Belt Tool Versatility Kit
Dynabrade 79152 1" W x 24" L 80 Grit DynaCut Premium Ceramic Belt, 50/pack 
