Magnetic inducer

Or maybe it's a laser. Lasers are the same as shells, right?

Among many things, Wheeljack's shoulder-mounted cannon can fire magnetic inducer shells. On detonation, they cover the target in a special magnetic dust. The victim, now magnetized, will find every metal object within 4000 feet is suddenly flying towards them. The dust may also force the victim to change mode and/or disable them.

Fiction

Marvel The Transformers comics

Wheeljack could fire a number of different shells from his shoulder cannons including magnetic-inducer shells which covered their victims in a magnetic dust, attracting ferrous objects from up to 4,000 feet away. Wheeljack's Universe profile Wheeljack used the weapon on Frenzy, bathing the Decepticon in magnetic powder and causing him to be buried by various nearby ferrous objects. DIS-Integrated Circuits!

The Transformers cartoon

Following the construction of the Dinobots, the Autobots found themselves under attack by their own creations. Grimlock, Slag and Sludge rampaged through Headquarters until Optimus Prime ordered they be destroyed. Wheeljack instead suggested the use of his magnetic inducer, which covered the three Dinobots in shimmering yellow dust and forced them to return to robot mode, successfully halting their ruckus. S.O.S. Dinobots

Dreamwave Generation One continuity

Wheeljack's shoulder-mounted cannons could fire a magnetic inducer that caused its metallic target to attract other metal objects. Wheeljack's More than Meets the Eye profile

Unite Warriors

The combiner Sky Reign could fire magnetic inducer shells from his Wheeljack arm, using them in battle with Grand Galvatron. Sky Reign Chapter

Games

Transformers Legends

When the remaining three Dinobots went on a rampage following the disappearance of Grimlock and Swoop, Wheeljack used his magnetic inducer on Slug, though it turned out to be not as effective as expected. Day of the Dinobots - Part 1

Toys

The Transformers

• Wheeljack (Autobot Car, 1984/1985)

• Accessories: 2 shoulder cannons, 4 rockets, left & right wings, left & right spoiler halves

The Transformers Wheeljack could fire magnetic inducer shells from his shoulder cannons according to his packaging bio. This toy was released again in 1990 as part of the European/Australian Classics line.

Notes

• Wheeljack's original toy came with four rockets; taken in conjunction with his packaging bio text these could represent a gyro-inhibitor shell, a magnetic inducer shell, a shrapnel needle shell, and perhaps a new type of shell that Wheeljack is currently experimenting on.
• The specific wording of Wheeljack's bio—"Shoots magnetic inducer, shrapnel needle and gyro-inhibitor shells from his shoulder cannons"—is somewhat ambiguous, perhaps leading to this weapon being depicted as a magnetic inducer shell in some continuities and as a magnetic inducer in its own right in others.