Hornady Micrometer Vernier Ball 0. 0001 inch.Accurately measures case neck thicknesses from 0-1" with accuracy within 0.0001"Ratchet stop ensures uniform pressure for measurement repeatabilitySpindle lock preserves measurement when removing cartridge case from micrometerBaked-enamel finish on C-frame provides durabilityIncludes a plastic storage case Specifications for Hornady Vernier Ball Micrometers: Manufacturer: Hornady Color: Silver Fabric/Material: Plastic Frame Polycarbonate Lens Quantity: 1 Finish: Baked-Enamel Features of Hornady Vernier Ball Micrometer: Ideal for accurately measuring case neck thicknesses Measure from 0-1in with accuracy within 0.0001in Ratchet stop ensures uniform pressure for measurement repeatability Spindle lock preserves measurement when removing cartridge case from micrometer Baked-enamel finish on C-frame provides durability Plastic storage case protects micrometer when not in use Package Contents: Hornady Vernier Ball Micrometer Hornady 050059: Micrometer Vernier Ball