The RCBS Vernier Ball Micrometer is an economical precision tool designed for handloaders who need to measure case neck thicknesses with exceptional accuracy within 0.0001 inch. Featuring an all-metal body and thimble with matte finish this durable micrometer provides reliable measurements for reloading applications.RCBS Vernier Ball Micrometer for case neck thickness measurement0-1 inch measuring range with 0.0001 inch accuracyAll-metal body and thimble construction with matte finishRatchet stop on thimble for consistent measurement pressureThimble lock prevents accidental movement during readingsIncludes adjustment wrench and protective storage caseEssential for precision handloaders and reloaders who demand accurate case preparation and consistent ammunition quality. The ball micrometer design ensures proper contact with curved case neck surfaces for repeatable measurements.