Usage Tips:Outside Micrometer Set - Measuring Range: 3 inch-4 inch, The precision of this outside micrometer is 0.0001 inch. Precision Measuring Tool - Outer micrometers are capable of measuring to extremely small increments, allowing for precise fitting, machining, and quality control inspections, ensuring that products meet specified tolerances and standards. Ratchet-stop Mechanism - The ratchet stop thimble featured on this product ensures precise and consistent measurements. Its chrome on both the thimble and sleeve offers resistance against rust and minimizes glare. Easy to Use - The spindle and anvil are precisely aligned, allowing for smooth and consistent movement during measurement. Wide Applications - Outside micrometers are commonly used in manufacturing, engineering, quality control, and other applications where precise measurements are essential. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Material: alloy steel colour: As shown Package Contents: 1 x Outside Micrometer Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.