Product details:

Vernier Outside Micrometer set includes standards, spanner wrench, and case. Micrometer Set, Micrometers Included 1 In., 2 In., 3 In., 4 In., Range 0 to 4 In., Resolution 0.001 In., Thimble Ratchet, SPC Output No, Includes 3 Standards, Spanner Wrenches, Carbide Faces and Positive Locking Clamp, Resolution (In./mm) 0.001 In.