Stethoscope, Mechanics, Used For Locating Troubles In Engines, Bearing And Other Moving Parts, Material Aluminum Steel Probe And Needle, Listen For Trouble By Tracing Sound Of Flowing Water, Oil, Gas, Or Steam, Identify Piston Slap, Worn Gears, Faulty Valves, Water Pump Failure, Damaged Gaskets And Defective Bearings, Handle Is Shock Resistant