The Sinclair case neck micrometer is engineered with a Starrett micrometer head, capable of measuring in increments of 0.0001 inches. This tool is specifically designed for handloaders to precisely measure case neck wall thickness. Both the micrometer head and anvil are fully adjustable, enabling the measurement of neck wall thickness up to the junction of the case neck and shoulder. These adjustable features, along with the ratchet control integrated into the micrometer head, allow users to calibrate the tool according to their personal preferences and requirements. The tool is mounted on a stainless steel base, providing the handloader with the convenience of using both hands when measuring brass. The micrometer head is housed in an anodized aluminum frame and the anvil is constructed from stainless steel. This micrometer is suitable for cases of .17 Cal and larger. The tool is pre-zeroed and manufactured in the USA.