Starrett Depth Micrometer with Combination Ratchet and Speeder, Ring-Type Locknut, Ratchet Stop and Locknut - 0-75mm Range, .01mm Graduation, 63.5mm Base Length - 3 Rods - 440MZ-75RL

The Starrett 440, 445 Vernier Depth Gauges, Ratchet Stop, Lock Nut, Micrometer Type, Metric, depending on the model, have a measurement range of 0 to 75mm, 0 to 150mm, or 0 to 225mm; a resolution (or smallest graduation interval) of 0.01mm; with + or – 0.002mm of accuracy. The vernier scale enables precise measurements in fine units. These gauges include measuring rods, 3.2mm or 4mm diameter, to cover the intended range. The bases are available in a choice of 63.5mm, 75mm, 100mm, or 150mm long, and all measuring surfaces of these units are hardened, ground, and lapped for durability and accuracy. These gauges have a ring-type knurled lock nut, ratchet, and speeder for stability and to apply uniform pressure and make quick adjustments for precise measurements. These units include a protective case. Depth gauges are typically used in manufacturing, machining, and mechanical engineering. Depth gauges are precision measuring instruments used to determine the depth of any shape that has a step, groove, or slot. These gauges often take the form of sliders that travel on a measuring beam or rods, are moved to position by hand, and then adjusted with a calibrated screw. The base of the gauge rests at the top of the shape whose recession is to be measured, while the beam or rods extend to the bottom of the recession to determine the measurement. Gauge position is read from a graduated scale, dial, counters, or an electronic display.The L.S. Starrett Company manufactures precision measuring tools, metrology and testing equipment, and saw blade products. The company, founded in 1880, is headquartered in Athol, MA.

• Heavy-Duty - The Starrett Micrometer has a ring-type knurled lock nut for quick and sure locking. The depths of holes, slots, shoulders and projections can be measured with these fine tools.
• Quality Tool - It is made to last with quality materials that ensure durability and better work performance. Starrett tools can be used in various applications and offers unparalleled service with execution like no other.
• Easy to Use - Incorporating convenience and excellence, Starrett tools are designed to be user-friendly. Whether you're an experienced professional or an amateur when it comes to home improvement, our tools are handy and accessible.
• Meets Strong Demands - Committed in providing customers with consistent and reliable solutions, Starrett has set the standard for precision, quality and innovation. Our products are long-lasting, robust with excellent service and performance.
• Accurate Measurements - Starrett precision measuring tools exceed accuracy and performance requirements of national and international standards, providing excellent fine precision tools for industrial, professional and consumer markets worldwide.