The curved top extension, to be installed at the top of the rail, over the working platform, allows the user to be connected with the trolley even at the ladder top termination, ensuring complete safety.
The top extension and the rail extremity come with a spring lock, which prevents the trolley from accidentally moving out of the rail.
The trolley and the rail extremity are equipped with a non-inverting system, which avoids installing the trolley upside down.