Measuring tools, especially well made tools, are expensive. This is an area of purchasing where we recommend that you examine your individual needs carefully to determine what tools you will need. The number one tool that no handloader should be without is a good set of dial calipers. Save money elsewhere, buy a decent pair of stainless steel 6"" calipers. Micrometers can also be useful tool when you need to measure in .0001"" increments. Standard one-inch micrometers are used for accurately measuring outside diameters. For example, case neck diameters, body diameters, mandrel sizes, etc. Ball micrometers are mainly used for measuring case neck wall thickness, for sorting brass by thickness, Mfg: Mitutoyo
