SPETTON Sandvik Hd Pro 7 mm spearshaft

HD PRO Spetton spearguns are made from 48/50 HRC heat-treated Sandvik steel, making them very durable, even when struck into the hardest rock. The steel hardness test is performed by penetration with a diamond point. The particularity of this new series is represented by the special welding characteristics of its Shark fins. They are welded with micro-welding laser, with housing, not through, avoiding critical points in its structure. All harpoons are made with 4 Shark fins, 3 of which are grouped in a rear position, while the last one is further away, to aid in loading. All Shark fins have a monofilament hook hole, in order to offer more possibilities for the user. All are polished and finished by hand, so as not to have abrasive profiles that can damage the monofilament. In addition, its fin is made of 1.2mm reinforced steel with a special extra-resistant rivet.