This is a three rolls tool built in a frame. meant to create arcs and almost circles. The rolls made of C45 are heat-treated and bushed. The following materials can be used in the manufacturing process: ironplate 20x3, 20x4, 20x5mm; steelrod till 12mm diam; profile till 15x15mm. The so-called leader-rolls on the side can be changed to different diameters, depending on the width of the material you want to bend.