Mechanical Outside Micrometer Set, 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, Rod Lengths Included 1 in, 2 in, 3 in, Accuracy +/-0.001 in