• Excellent technician's aid designed to detect and locate sources of abnormal noise. • Allows technician to quickly find and analyze the source of a problem in engines of other moving parts. • Sound is transmitted and amplified through a sensitive diaphragm. • Use to pinpoint worn or defective bearing; locate cylinders with engine knocks; and determine if any fuel injectors are hung-up or inoperative. • Includes a 12" probe extension.
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