This is the Eradicate Lion Fish (E.L.F) Tool Limited 10 Range Eco-Friendly Features: Uses standard 6mm spear tip threads All metal components 304 Stainless Steel Easy screw off cap for freshwater rinsing Self draining design DEADLY ACCURATE AND ECO FRIENDLY... LIMITED RANGE The ELF tool (Eradicate LionFish Tool) was developed by divers concerned with the damage Lionfish do to the reefs but who were also concerned with the damage that alternative Lionfish hunting devices such as traditional spearguns and nets do to the reefs.