The SKF TMST 2 is a very high quality, sensitive instrument enabling the determination of troublesome machine parts by the detection of machine noises or vibrations. With the included headset, two different length probes, an adjustable sound level facility and a comparative prerecorded demonstration tape, it is an ideal instrument for detecting troublesome machine parts or damaged bearings. The instrument, probes, headset and demonstration tape are supplied complete in a sturdy carrying case.