Features and Benefits: * Graduations .0005"/.01mm * Easy to read digital display with inch / metric conversion * Selectable depth stops for easier use * Pointed anvils and 4.25" long arms to inspect drums before turning or replacing * Measure automotive and heavy duty drums Easy to read digital display with inch / metric conversion. Selectable depth stops for easier use Pointed anvils and 4.25" long arms to inspect drums before turning or replacing. Measure automotive and heavy duty drums.