The alloys, out of which the super spear-shaft is manufactured, are firmer and more durable than the main stainless steel alloys. Furthermore, the 3S spear-shafts construction, allows it to take the distribution of the strain caused by a large and fierce fish into account. As a result, a 3S spear shaft, with a diameter of 6.35 mm is more resistant and firm than most spear-shafts with a diameter of 7mm.
Spear-shafts of different manufacturers are produced out of different types of stainless steel. Out of the types of steel used in the making of spear-shafts, the most sturdy would be hardened steel (17- 4PH), however, hardened steel, unfortunately, rusts even in the slightly salty waters of the Baltic Sea. Several manufacturers cover their spear-shafts and tips in galvanized zinc and nickel, nevertheless, the artificial layer scratches off over time, allowing the corrosion to begin.
The most corrosion resistant spear-shafts, are composed of AISI316 steel. They withstand a few weeks of spear-hunting in the Mediterranean Sea, with no visible signs of rust. Nonetheless, these types of spear-shafts are much less sturdy, relatively soft, impossible to temper (harden) and bend very easily.
3S spear-shafts are completely resistant to all kinds of corrosion even in the waters of the Dead Sea and oceans. Types of steel, out of which the spear-shaft is composed, are used in the construction of Nuclear reactors and in the production of highly toxic and corrosive goods
after 2 months in the Mediterranean
The 3S spear-shafts incorporate a uniquely constructed spear tip, which has an interchangeable head, made out of an alloy that is in firmness inferior only to a diamond. This razor-sharp head, handles most shots at underwater rocks without becoming blunt, making the spear-shaft unstoppable for any fish scales. Moreover, the head is sharpened from both ends. Therefore, in the unlikely case, that the head becomes blunt, there is no need to change it! The head could be easily put on the other way around, with the sharp end outwards