What is the common name for a rod that is known as a circle rod?

The common name for a rod referred to as a circle rod is indeed the loop rod. This rod has specific design characteristics that allow it to create spiral or looped curls when used in hair styling techniques. The name "loop rod" stems from its circular shape, which promotes the formation of round curls, making it a favored tool for achieving specific hairstyles.

Loop rods are essential in various methods of hair curling, especially in creating defined curls for clients who desire a bouncier look. The construction of the rod allows for hair to be wrapped around it easily, ensuring uniformity in curl size and shape. This functionality distinguishes the loop rod from other types of rods designed for different curling styles or textures.