### Instruction: Given the following note about training in a specific style of karate, tell me why its practitioners consider its fist alignment to offer advantages for their striking.
### Input: Shōrin-ryū is generally characterized by natural breathing, natural (narrow, high) stances, and circular, rather than direct movements. Shōrin-ryū practitioners assert that correct motion, moving quickly to evade violence with fluid movements and flexible positions are important, and that a solid structure is vital for powerful blocks and strikes. Stances that are too deep generally make body movement difficult. Another feature in this system is how the student is taught to punch. Generally, there is neither a horizontal nor vertical punch in Shōrin-ryū. Punches are slightly canted to the inside (Isshin-ryū), with the largest knuckle of the forefinger (third from the tip) in vertical alignment with the second knuckle of the pinky finger. It is believed that this position is key in lining up the bones of the arm and creates a faster, more stable and powerful strike.
### Response: Practitioners of Shōrin-ryū believe lining up the second and third knuckle, along with the bones of the arm, enables them to deliver faster and more powerful punches.