Features 1、Range and Resolution: The measurement range of the rotor digital caliper is 0‑6in/0‑150mm. Its accuracy is ±0.002in/0.05mm. The resolution is 0.0005in/0.01mm, 1/128in. 2、Reading Units Convertion: Disc brake rotor micrometer can be converted among inch, millimeter and fraction units, switch freely according to your needs. 3、Manual On Off: You can manual power off and on disc brake rotor caliper , effortless gliding action, hardened measurement surface, durable in use. 4、Wide Application: Brake disc thickness measuring tool is designed for professional auto mechanics and heavy duty applications, widely used in home, industrial and automotive applications. 5、Recommendation: Please note that for more accurate measurements, use a small piece of paper or card to clean the outer jaws before each use. Specification Item Type: Disc Brake Rotor Micrometer Material: Metal Unit: Metric Imperial Reading Measurement Range: Approx. 0-6in/0-150mm; Reading in inch, mm, fraction Resolution: Approx. 0.0005in/0.01mm, 1/128in; Accuracy: ±0.002in/0.05mm Display: 1/2in x 1 1/2in (13mm x 38mm) LCD High Quality: Every Digital Meter is Thoroughly Tested Before It's Ready for Sale Battery Type: Button Battery, Built in a Battery (Comes with an Additional Companion Battery) Battery Type: LR44 1.5V Battery Capacity: 160mAh Applicable: Universal Package List 1 x Disc Brake Rotor Micrometer 1 x Screwdriver 1 x Button Battery 1 x Blow Molding Box