Insize 3290-187, V-ANVIL MICROMETER_7 flutes_1″-1.8″, 6928640377983

Graduation .0001″.
Measure the outside diameter of cutting tools (such as taps, reamers, end mills) with 3 or 5 flutes.
Ratchet stop.
Carbide measuring faces.
Supplied with setting standards