This line of grill and oven brushes features high temperature-resistant brass or carbon steel fi laments. Brass bristles are soft enough to not damage grill grates, yet are abrasive enough to address baked-on residue found in cracks and crevices. Perfect for use on porcelain, cast iron cooking grates as well as stone ovens. Carbon steel round wire is ultra-flexible and an excellent cost-effective choice. Made in the USA.