Thisabnormity bending toolcan process 10*10mm-20*20mm square steel. And the circle curving arc, warping angle extending strength of the round steel and so on. Meanwhile, this machine can produce kinds of special shaped model in batches and also can curve flat iron, steel in straightness to make the revolving stair. 1.make angle 2.make arc iron craft hand tools, wrought iron manual tools, wrought iron hand tools.