Inspect auto and heavy-duty truck drums before turning or replacing. Easy to read digital display converts to SAE or MM with a 4" - 20" (100mm - 425mm) range in .0005" (.01mm) graduations.

Features:

• 4" - 20" / 100mm - 500mm capacity
• Inch/metric conversion
• 4 inch drum preset, zero set, hold function
• Preset depth stops at 1 inch and 1.5 inch
• Resolution of .0005 inch/.01mm