Snake-like precision is yours on the water. Strike your prey where it lives. To design the Casitas, Shimano used the image of a snake striking its prey for inspiration. To perfect the strike, they use SVS Infinity, so you can simply and easily make adjustments to the spool even on the fly. This Reel also had S3D Shimano Stable Spool Design for vibration-free long casting, making sure you can hit your mark... no matter where it is. Our apologies in advance, it doesn't come with a set of fangs. SVS Infinity for on the fly spool control adjustments; S3D Shimano Stable Spool Design for balance and vibration-free long casting.