4 products RINGFEDER® K6 Tow coupling RINGFEDER tow couplings are - more robust and safer due to forged materials - have improved performance values to meet higher demands - are proven for the toughest off-road conditions - meet the speci... Ringfeder® tow coupling 6451, 6451V Tow coupling for connecting to drawbar eyes according to DIN 74054 / VG 74059. Ringfeder® tow coupling 6434 Tow coupling for connecting to drawbar eyes according to DIN 74054 / VG 74059. Ringfeder® tow coupling 6441 Tow coupling for connecting to drawbar eyes according to DIN 74054 / VG 74059.