The reinforced type spiral represents technologically the best on the market in terms of quality, precision, robustness and durability. It is obtained by cold manufacturing with an accelerated process, which reduces the taper and increases the mechanical qualities of the material. It is supplied with or without tube-axis and in both the right and left directions.

The reinforced shaftless screw conveyor is also known as helical worm without shaft, worm without core, Archimedean worm, Mud or sludge worm ... It is used for the treatment of solid waste, and in industry in general.