Bending formers and back formers - form and pressure resistant, in high-strength, high-slide, glass-fibre reinforced polyamide. Optimum mating of bending formers and back formers ensures sliding appropriate to the material without cracks and wrinkles. Angle scale 0 to 180° provided on each bending former and mark on the back former ensure precise bending. Rapid change of bending formers and back formers.