The Clarke 0in. to 1in. External Micrometer features a tungsten carbide-tipped anvil for superior durability and ratchet stop for precision measurements without overtightening. Locking barrel allows for quick, easy batch measurements. Precision engineered from high-grade stainless steel. Clarke precision measuring tools deliver precise, accurate, reliable measurements every time. Caliper Type: Micrometer, Jaw Size (in.): 0.15, Length (in.): 5 1/2, Measures: External SAE & metric, Range (in.(mm)): 0 to 1in. (0 to 2.5cm), Capacity: 0in. to 1in., Display Type: Manual, Material: Stainless steel, Single, Pair, or Set: Single, Case Included: Yes Accurate to ± 0.001in. Manual display of SAE and metric Includes adjusting wrench and nylon carrying case