The Starrett 224AARLZ interchangeable micrometer has the following specifications:

• Range: 0-4
• Graduations: .001
• Standards Included: 1, 2, 3
• Anvil/Spindle Material: Steel
• Thimble Type: Ratchet
• Lock Nut Type: Knurled Ring Type

Features:

• Suitable wrenches are furnished to make necessary adjustments
• Combination ratchet and speeder for uniform pressure and quicker adjustment
• Quick and easy sleeve adjustment
• Advanced sleeve design with staggered lines and distinct figures for precise and easy readability
• Balanced frame and thimble design ensure easy handling and better readability
• Rigid and stable special cast iron frame with appropriate perforations for lightness and ribbed for strength and stability
• Micro-lapped measuring faces
• Large thimble diameter with distinct figures
• Ring-type knurled lock nut for quick and sure locking
• Interchangeable anvils for diversified gaging
• Each micrometer is equipped with a series of easily interchangeable anvils, thus providing the full range in steps of 1 with a single micrometer
• These larger sizes have .300 (7.6mm) anvil and spindle diameters for ease of use on larger work
• Extremely hard and stable one-piece spindle
• Starrett No-glare satin chrome finish on thimble and sleeve minimizes annoying surface glare under bright lights and resists rust