6mm thread. Designed for large powerful fish this breakaway points has a 4” winged slip-tip configurations. Tip is hardened 17-4 stainless and feature a multi-braid stainless cable. These tips hang on no matter how hard the fight while minimizing damage to your spearshaft. 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.