●Universal Connector - The 7 Prong Flat Harpoon with 8mm Outside Thread , It Is Easy To Connect To a 8mm Inside Thread Pole . And Most of The Pole Thread Is 8mm . ●Durable Material - The 7 Prong Flat Harpoon Is Made of High Quality Stainless Steel ,Hard ,Sharp and Barbed Design Which Make The Prey Difficult to Escape ●Portability - Length 19cm X Width 16cm (7.55" X 6.29") Light Weight , Portable ●Widely Applications - We Can Use The Harpoon In Salt Water and Fresh Water To Catch Fishes and Frogs and So on ●Improved Design - Each Prong is thickened from 0.4cm to 0.6cmto ensure the hardness and strength when hunting .