The Manual winch fly lines are usually used for lifting loads higher than those of Manual fly lines and for which the lifting speed is not important, for example for the trusses of the stage lights.
They are used both with Fixed pulleys structure systems and with Flyloft systems, above all for their economy compared to the Motorized fly lines with fixed pulleys and the Flyloft motorized fly lines.
Due to the importance of the load they use steel cables and metal trusses, usually Aluminium trusses.