The knuckle joint press employs toggle lever mechanism, which expends small force as to produce great force. Thus efficiency of economized energy is good. The frame employs the framed structure, featuring higher rigidity. The 4000 K.N. Knuckle Joint Press employs the steel-sheet welded structure frame with excellent rigidity and good appearance. The press is mainly used for coining, levelling, cold extrusion and other operations in automobile, motorcycle, bicycle, tractor, intrument, meter, medical apparatus and instruments industries.