Steel Ball

Two distinct designs appear in the story. The Zeppeli family's version is a smooth, near-perfect sphere of polished steel roughly as big as a baseball, marked on opposing faces by a pair of broad hexagons whose corners are almost linked by lines wrapping across the surface. The second design, the Wrecking Ball, belongs to the palace guards of Naples and looks quite different up close. Both trace back to the royal court, where executioners and guardsmen first refined their use.

A Zeppeli ball is tuned for a strong, adaptable Spin aimed at the body's organs and structures. It can be hurled far and hard, holds a steady rotation over distance, and even curves back to its thrower after striking, with a working reach of roughly twenty to thirty meters. Its executioner heritage explains that focus, since the technique was refined to deliver instant, dignified death no matter how the condemned was built. The Scan power of the Saint's Corpse pairs with these balls as well, because an eye tucked inside one lets its holder see through it.

A Wrecking Ball behaves differently, studded with dimples that cradle smaller satellites. Those satellites can peel off in flight, and even a near miss throws out a shockwave. Their Spin induces a temporary loss of feeling across the left half of the target, described as a stroke or bleed struck into the motor cortex.

Gyro Zeppeli is the foremost handler of the Zeppeli spheres, a craft passed to him through his bloodline from figures such as Gregorio Zeppeli, and Johnny Joestar gradually learns to throw them as his own command of the Spin grows. The Wrecking Ball stays with Naples' royal guards, chiefly Wekapipo and his brother-in-law.