content: cam shafts, drive shafts, balancing axles, um.... things of that nature. same as a wood lathe but for metal. for the home you would have to be basically my dad to really need one, and that was probably one of the trade relevant tools he never bothered getting for home because he had a full mobil mechanical workshop full of them to play with. His compresser and welder were switched on 100% of the time tho... to this day my mother shits herself opening electricity bills because shes expecting the hammer to drop on 30 years of a garage wired up from the incoming side of the meter.....