Features Vernier scale outside micrometer sets come with multiple mechanical micrometers of the same style across a span of measuring ranges. These micrometers have the same construction, finish, graduations, and thimble type, and increase in 1” or 25mm increments. These sets are commonly used in automotive service and machine shops, tool rooms, and in inspection departments. Range / 0 in to 4 in Resolution / 0.001 in SPC Output / No Number of Micrometers / 4 Operation Type / Mechanical Thimble Type / Ratchet Case Included / Yes Case Type / Plastic Case Includes / (3) Standards, (4) Micrometers, Carbide Faces, Spanner Wrenches Accuracy / +/-0.001 in