Lyman's 1" Digital Micrometer. After obtaining a quality caliper, the next precision instrument a reloader will require is a good 1" micrometer. The micrometer will allow the reloader to accurately measure the diameter of bullets and cartridges. This ability is important for bullet casters who slug their barels and size bullets to fit a specific firearm. Lyman's 1" digital micrometer has an "easy to read" digital display, accurate to .0001". (Counter reads directly to .001" and by vernier scale to .0001"). Features friction trimble for consistent measurements and spindle lock to hold setting. Includes padded wooden storage box.