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• Case and all items shown in case are included
• Extension for measuring up to 7 inches deep is included (extension is 4 inches long)
  
• Wrenches for calibrating and adding extension are included
• Calibration certificate and master ring gage is included
• Each BoreMic is individually serialized and calibrated
  
• Ratcheting clutch thimble allows repeatable readings
• Self-aligning and self-centering
• This unit can measure to within .03" of bottom of a blind hole
• This unit can measure bores from .425-.500 inches
  
• Three points contacting bore are Carbide for long life
  
• This BoreMic can measure within .00014 inches absolute accuracy
  
• MariTool Part# is BoreMic .425-.500