Hornady Vernier Ball - Micrometer !

FEATURES:
-Ideal for accurately measuring case neck thicknesses
-Measure from 0-1" w/ accuracy within 0.0001"
-Ratchet stop ensures uniform pressure for measurement repeatability
-Spindle lock preserves measurement when removing cartridge case from micrometer
-Bake-enamel finish on C-frame provides durability
-Plastic storage case protects micrometer when not in use