This will give you a more even distribution of color where you want it.The best and cleanest way to apply hair coloring, hair dyes and scalp treatments directly to the roots.Made of high quality material, which is durable and lasting for use.Simply fill the dye bottle with your pre-mixed hair color and use the pump action handle to get the dye flowing through the comb head.They are very practical and useful hair coloring tools for hair salon.