Includes 4 Micrometers with measuring ranges: 0 - 1", 1 - 2", 2 - 3", 3 - 4", Vernier Graduations: 0.0001", accurate to 0.0001". Solid casting frame. Lock nut Crisp, clear, easy-to-read graduation. Hardened and ground spindle with carbide anvil ensure durability and accuracy. Super hard carbide tipped. Ratchet handle for precise application of force. Powder coated baked finish Packed in fitted case, completed with calibration standards and wrenches The Accusize Industrial Tools 0-4" Ultra-Precision M-Type Outside Micrometer set offers machinists, engineers, and toolmakers exceptional accuracy with a measuring resolution of 0.0001". This 4-piece set, with carbide-tipped anvils and hardened spindles, ensures durability for demanding precision tasks. The ratchet thimble allows controlled, repeatable measuring force, while the lock nut secures measurements for dependable results. The set includes calibration standards and adjustment wrenches to maintain precision over time. Stored in a fitted plastic case, the micrometers are protected from damage and organized for easy transport, making them ideal for use in both machine shops and inspection rooms.