Precise Measurement: The disc micrometer has a measuring range of 0-6inch/0-150mm. You can accurately measure the thickness of the brake disc to that your brake system is in top condition. Multifunctional Use: not only suitable for brake disc measurement, but also for general length and depth measurement. This versatility makes it an perfect tool for any workshop or garage. Materials: Made of stainless steel, with excellent durability and resistance, to long-term use without damage or problems. Portable Design: The compact and design makes it easy to carry and store, allowing you to perform measurement work anytime, anywhere, whether in the workshop, garage or field Imperial and Metric conversion: With imperial and metric unit conversion, you can easily measure in different systems and compatibility with a wide range of vehicles. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Red Material:Stainless Steel+Zinc Alloy Package Contents: 1x car caliper 1x Screwdriver 1x English and Chinese manual 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.