Features: Suitable to be sewn to 18 strands of thick thread, and horns are guaranteed for lifetime use and reinforcement. Separate drive shaft design, if encountering obstacles in operation, it will automatically cut off the power supply and the oil-immersed lubrication system after five laps of idling. The sewing part of the lifting and lowering stitches has no head and thread tail to enhance the sewing speed. The machine is fixed with double bearings, so the main shaft is extremely durable.