For complex and challenging sewing, heavy duty machines come in scene. These machines are perfect for thicker fabric and intricate designing which the normal machines cannot do excellently. While you may want to consider heavy duty machines for such tasks, they are known for their high speed, amazing performance, and durability. Also, they are powerful in stitching belts, slip covers, tents, pillows, cushions, and upholsteries etc. If you are considering buying such a machine, you should choose a compact unit that fits into your specified area. Well talking about the features, these machines consist of a walking foot to stop heavy materials such as denim or leather from moving when you are stitching them.