Imagining monsters that surpass the norm and seeking only great power from a rod results in merely a stiff rod that demands muscle strength and physical power from the angler. Such a "hard rod" is difficult to handle, exceeding the strength and physical power of the angler. That's no way to battle monsters. What big game requires is a rod that places constant pressure on a monster and lifts it to the surface, while offering the angler easily handling even through the most protracted fight. The pursuit of a solution to this need arrived at the DBL Structure blank design.

An infinity of patterns for blank production exists, including in the elasticity, thickness, amount of resin, and fiber angle in the carbon material that is a key element in blank production, as well as in the taper design of mandrel. From among the infinite combinations of these elements, DBL Structure finds the optimal material heavy layering (Deep) and optimal fiber direction (Bias), and stacks these (Layered). This blank design technology in effect creates the physique of a trained heavyweight athlete, dimensions apart from rods that seek delicacy and lightness. Its manufacturing method, which allows free design of the required torque and power, fulfills the necessary action, durability, and flexibility. Its development called for high-level blank producing technologies in the compositing of complex carbon materials and, above all, painstaking work to discover the optimal choices from among infinite combinations. (Patent pending)