17-4 stainless steel, certified, aircraft grade, condition A, center-less ground to ensure absolute straightness, rust resistence, and consistency. Manufactured in a state of the art machine shop with CNC mills, lathes, drilling centers, and straightening machines. In house, digitally controlled, heat treating oven. All machines and materials are made in the USA. All machining is done on site, under strict quality control methods, to ensure the finest spear shafts available. 
 
Custom shark fin tab height and spacing configuration make these shafts ideal for use with roller spearguns. 5cm tang length with euro notch. 3/32" shooting line hole. Two wishbones can be stacked on the rearmost tab. Machine pinned (2.4mm diameter), Hawaiian style single flopper (1.2mm thick), hand tuned. These shafts are perfect for a short double roller with twin 14mm reactive rubber bands, or a properly powered inverted roller.