- The main body is made of high strength alloy aluminum by die-casting with ideal structure. Running evenly, shifting flexible, application widely. The speed system is controlled by feeler of controlling silicon unit, easy operating. Idler pulley is fixed under main body, moving along rail conveniently. New designing, bigger model board can be fixed. Can cut different shape part with good precision and good surface. Good for batch producing in same shape. Used for ship building, oil, chemical, and metal structure, etc