It has end pretending of high precision. It has high accuracy end pre-bending when bending the end and it can freely set the length of the edge. Top roller presses down, and high accuracy end pre-bending is done under a certain pressure. It has NC controlled high producing efficiency with simple operation and high efficiency. It has different uses with coordinating controlling methods. There are following controlling methods according to its uses: TNC: for many types but small quantity of production T&BAC: for few types but large quantity of production CNC: for many types but large quantity of production . It has excellent product precision. Products have superior precision due to continuous bending and high accurate end pre-bending. Products have superior precision, as the top roller is in the shape of drum. With the supporting roller adjusted it can coil ideal products in the wide range from sheets to plates.It has rich bending shapes. There are such different shapes as O shapes, U shapes and multi-section shape. The method is as follows: O bending: back bending mode U bending: front bending mode Special bending: composition mode;