The pulleys are suitable for stringing the pilot rope by an helicopter. The pilot rope in automatically positioned in the (central) wheel. Special guides ensure the correct positioning of the rope during stringing operations. The wheels are made of aluminium alloy mounted on ball bearings; the lateral ones have the groove lined by neoprene ring; the central one has the groove made up of wear-proof interchangeable nylatron sectors. The frame is made of galvanized steel. The pulleys are supplied with fixed connection.

Grounding device or complete conductive sheaves are available upon request.