Big load, exposed rock, no margin for error. The 12 mm REEF 4-prong is the thickest option in the range — built to clamp onto underwater structures and stay there under real load. Hot-dipped galvanised finish means the salt isn't going to eat through it. Prongs are straightened when they hit your hands, so there's no workshop step before you're in the water. Pick it up, hook it on, sort
| brand | JAYCAR |
| product_line | REEF |
| prong_count | 4 |
| prong_diameter_mm | 12 |
| prong_diameter_in | 1/2 in |
| finish | Hot Dipped Galvanised |
| supplied_state | Prongs straightened |
| application | Underwater anchoring to rock or coral structures |