This versatile instrument accurately measures minute distances for precise readings on bullets or objects up to 1 inches in size. Features: Measure from 0 to 1 inches in 0.0001 inches increments Ratchet stop allows uniform pressure to enhance measurement repeatability Spindle lock preserves measurement when removing micrometer from work piece Baked-enamel finish on C-frame provides durability Plastic storage case protects micrometer when not in use