"Catherine wheels"

A Catherine wheel is a type of firework made in one of two ways: either a spiral-shaped tube filled with flammable powder, or a rocket mounted with a pin through its center so that it spins and throws off a spray of sparks and colored fire.

It is named after a medieval instrument of torture called the breaking wheel, on which St. Catherine was supposed to have been martyred by the Romans in the early 4th century.