These 6.3mm diameter shark-fin model shafts are available in the following diameters- 110, 120, AND 130. The barb thickness is thicker than typical barb pins; the pin diameter is 2.1mm in the 6.3mm shafts. Each sharkfin has a hole providing three options to connect the shooting line. The shafts are made using 17-4PH heat treated stainless hardened to 47 Rockwell. The new barb is produced using the same steel (47Hrc) for increased strength. The hole for the pin that holds the barb in place and the pin itself-are recessed completely so they do not protrude from the barb. Thanks to this feature, the penetration in the flesh of the prey is greatly increased. The shark fins are produced by MIM (metal injection molding).
Please note that Freediving and spearfishing are inherently dangerous sports and should only be undertaken by experienced, well-trained divers. More powerful spearguns must be fired with two hands and a locked elbow to prevent injury from excess recoil. Do not load or unload your speargun out of the water, treat every speargun as if it were loaded. Never point your speargun at anything you do not intend to shoot. Before you begin your dive, be sure to check all your gear. You should never dive alone and your equipment should be serviced regularly. You should always plan your dive and dive your plan. You should discuss safety precautions, your plan, and contingency plans with everyone onboard BEFORE you dive. Communication among divers and operators is imperative. Failure to adhere to these guidelines could potentially result in physical harm or death. Blue Tuna Spearfishing is not responsible for any loss, damage, harm, or death caused by using any of our products.