The deep-bed design of our Cast Iron Deep-Bed Fireplace Grate keeps the logs in where they belong, so they won't roll forward. The self-feeding design of this fireplace grate keeps the wood and hot coals together, so your fire burns more efficiently with less smoke and radiates more heat into the room. Smaller slots allow for generous air flow, while keeping hot coals in the grate for maximum burn. Heavy duty cast iron fireplace grate won't burn out or warp. Easy assembly.