You're a regular reef hunting super sportsman, and need a spear point that will withstand a run in with reef rocks.
The JBL Twin Barb Rock point spear tip has 6mm threading and 2 5/8" wingspan to increase the holding power of small to medium fish. The wing retainer system allows you to easily remove your catch from the spear shaft.
Can be used on both a 6mm threaded speargun shaft or 6mm threaded pole spear.
JBL Twin Barb Rock Tip - 6mm Thread