Stove and fireplace grates like these lift firewood up off the bottom of the firebox to improve airflow to the fire. These heavy duty grates are built to last from 1 x 3/8 inch flat steel bars. Their all-steel construction is designed to outperform their low quality cast-iron counterparts. *Special note 1: This grate works best in stoves and fireplaces that are used intermittently and allowed to cool off between fires. It is not intended for use in stoves that are operated continuously for more than 24 hours. **Special note 2: Some stoves and fireplaces are designed to be used without a grate. Please check the instructions for your stove or fireplace to make sure yours is not designed to be used without a grate.