The Ball O' Fuse Wire is a Hardmodepet-summoning item. It is purchased from the Zoologist for 50 after completing 70% of the Bestiary. It summons a pet Dynamite Kitten resembling the Orange Tabby variant of the Town Cat. The Kitten will ride to the character on a stick of Dynamite when far enough away, and will immediately dismount when it is on solid ground.
The buff's tooltip is in reference to the Explosive Bunny's tooltip, "For use with bunny cannon".