[Powerful Magnetic Base] Our magnetic base features an on/off switch for easy release of magnetic force. The base adopts a V-shaped design, allowing it to be installed on cylindrical workpieces. The maximum pulling force can reach 140 - 160 pounds (if a force of 160 pounds is required, a metal work surface is needed, with a surface thickness of 30 millimeters or more).[Adjustable Arm] The precise adjustable knob enables precise positioning to adapt to various working conditions, achieving more accurate measurements. The component surface is chrome-plated, featuring smoothness and durability. Our micrometer has a measurement range of 0 - 1 inch and a reading accuracy of 0.001 inch.[22 Indicator Point Set] Our micrometer includes 22 indicator points, suitable for various workpiece surfaces, AGD specification (4 - 48 threads).[Multifunctional] This testing gauge is suitable for extensive comparative measurements in the workshop and can be used in conjunction with machines, equipment, and other measuring devices.[S-afe Storage] Our micrometer comes with a blow-molded protective case, which is sturdy, durable, and convenient for storage and carrying. Specification:Measurement range: 0 - 1.0 inchesReading accuracy: 0.001 inchesMaterial: MetalDial diameter: (approximately) 60 millimetersDial length: (approximately) 100 millimetersMagnetic base size: (approximately) 60 millimeters * 55 millimeters * 55 millimetersVertical rod + adjustment rod (height): 176 millimeters + 150 millimetersCarrying case size (approximately): 28.5 centimeters * 20 centimeters * 7 centimetersWeight: 2 kilogramsIncluded items:1 metric vernier caliper1 adjustable magnetic base1 set of 22-piece metric vernier caliper measuring heads1 carrying caseStainless Steel