The 3 Prong Spear Head is a common accessory for spearfishing which guarantees a secure grip that does not let the prey escape. It's designed for small holes and for small to medium fish. The barbed prongs are made of burnished stainless steel to resist salty water. The prongs are embedded in a sturdy nylon base. It fits shafts and pole spear with a 6.5 mm thread. The 3 Prong Spear Head is designed and manufactured in Italy by Cressi, an Italian brand pioneer in freediving, spearfishing, and scuba diving equipment since 1946. The product is covered by a 2-year limited warranty.