BLU-109 is a type of precision-guided bomb developed by the United States. It is designed to penetrate hardened targets, such as bunkers and reinforced structures, making it effective in military operations. The bomb is equipped with a guidance system that allows for accurate targeting, reducing collateral damage. The BLU-109 has a weight of approximately 2,000 pounds and is typically used by various aircraft, including the B-2 Spirit and F-15E Strike Eagle. Its design includes a robust casing that enhances its ability to penetrate tough surfaces before detonating, ensuring maximum effectiveness against fortified enemy positions.