The Marine Sports Steel-Plated Tri-Barbed Tip has 3 barbed trident points that will pierce, punch through, and hold onto your next fish. Thanks to its 6mm threading, you can simply screw this spearfishing tip to the end of your pole spear (not included) or speargun shaft (not included). The tri-barbed tip from Marine Sports is best used to spear medium to small fish, such as lionfish. The steel plating increases accessory's strength and reduces corrosion. Tri-barbed tip pierces and holds onto fish Strong, corrosion-resistant steel plating For small to medium-sized fish 6mm threading