Ball Breaker - JoJo's Bizarre Encyclopedia | JoJo Wiki
The Physics of a Steel Ball: an analysis of Gyro's Steel Balls that I made as a project for my Physics class. Spoilers for various fights in Part 7. : r/StardustCrusaders
Gyro Zeppeli (JoJo no Kimyou na Bouken Part 7: Steel Ball Run) - MyAnimeList.net
JoJo's Bizarre Adventure Part 7 Jojo Steel Ball Run Gyro Zeppeli Figure Used | eBay