Abstract: A stringing apparatus for stringing a sock-line, optionally a phase line, within a closed framed opening of a power line tower of H-frame, portal or corset type uses a helicopter for pulling the sock-line where the stringing apparatus is suspended from the helicopter by a tow-line and the sock-line is fastened to it. The stringing apparatus comprises an arcuate channel which is attached to the sock-line and a rotating open spoke star-wheel defining legs the ends of which travel inside the channel and allows a continuous revolution of the star wheel thus allowing the closed frame cross member to travel through one of the gaps between the legs while the sock-line passes to the underside of the cross member and the tow line passes over the cross member.