This is the Riffe Single Flopper Hawaiian Pole Spear Shaft Features: 17/4 stainless steel, heat treated 2 1/8 (length) Single Flopper barb - heat treated / passivated for corrosion resistance 6mm thread pencil point tip Single Flopper Hawaiian pole spear shaft for RIFFE's Carbon Fiber Pole Spear Made from 17/4 stainless steel, heat treated for hardness "