We can bend with it any angle till 180 degree and in 3D. As you can see it in the photos you can make even chain parts as well.

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. Price:200€

www.oldtimer-hotrod.com

This is a tiny tool, manufacturing marvelous arc sizes from 4,6,8,10mm steelrod, but whoever feel like creating iron rings with it, it's not a big deal. The rolls were bushed and turned from C45 steel. It was important for me, not to place the device in a cage, because if I make a ring then it cannot be taken out. The tool itself can be easily set in a clamp, after one-one squeeze with the help of the turning handle we can roll back and forth the given material. It can be used to make decoration stuff for arcs shaped bracings or even for making strong rings etc. Price: 190€, with the set of three rolls. Further three rolls set cost 35€.