This is the shaft to fit Daiwa RCS machine-cut screw-in handles (non-shaft handle) to hex shaft handle reels.
There are two models, 2006 Real Four and former Team Daiwa model.
2006 Real Four fits to Daiwa spinning with hex-shaft handle models sold later than 2006. (Caldia, Freams, Exceller, Lebros, Regalis, Cy, Joinus, Presso Ipmiri, Gekkabijin MX, Desmarts, Saltist Gekka-bijin, Infeet Gekka-bijin and etc 1000-2500.
Former Team Daiwa fits to 1998-2005 model Daiwa with hex shaft handles. (Team Daiwa Z, X, S, 03Luvias, 04Presso, 04Gekkabijin, 05Emeraldas, Tournament Z, X, S, Airity, Capricorn, 04Fuego, and etc. 1000-3000.)