In order to respond to the ever-evolving game, the 21 Colt Prototype has evolved further by fully incorporating cutting-edge technologies such as ``Nano Alloy'', ``Torzite Ring Guide'', ``T1100G'', and ``Super Quattro Graphite Cross LV''. . Based on the concept that "lightness = sensitivity", we have thoroughly reduced the weight of everything from the blank to the guides and grip parts. The tip section has a solid outer diameter, hardness, and length set according to the corresponding situation, and has high reverberation sensitivity and sensing ability to capture underwater information such as changes in tidal current, and a high level that allows you to take action while always knowing the rig's position. It also has operability.