Rock Point Breakaway with 6mm shaft threads. Designed for large powerful fish the Rock Point Breakaway features a 4” wingspan, heat treated hardened 17-4 stainless steel, and a multi-braid 1/16” stainless cable. Breakaway design means they hang on no matter how hard the fight with minimal damage to your catch and spear shaft. Their low-profile, double barbed design allows for pinpoint accuracy and dependable deployment. Don’t trust a once in a lifetime fish to anything else.