1. For mild steel, stainless steel and special steel. 2. Hold down: ordinary electric or hydraulic AGC system. 3. Equipped with hydraulic bending device for working rollers which can fast adjust the crown status of rollers to change the distribution of contact pressure between rollers in order to control the plate form. 4. With simple construction, easy maintenance and less investment. 5. It is equipped with AGC system to get high precision, which is especially suitable for rolling high precision cold strip.