The Knapp Made Chainmail Combo Scrubber with Silicone Core features heavy duty stainless steel chainmail rings on the front and fine stainless steel chainmail rings on the back. This Knapp Made cast iron abrasive scrub makes it easy to clean cast iron, carbon steel, and stainless steel. Both the stainless steel chainmail rings and the silicone core are easy to clean and dishwasher safe. The silicone core provides a comfortable yet firm grip while the scrubbing pad requires minimal effort to clean cast iron, plus other cookware. The Knapp Made Silicone Core Chainmail Combo Scrubber comes with a lifetime guarantee.