1. Aluminum barrel stopper wrench is designed to fit most drums and can be used to open drums of various sizes, including 10, 15, 20, 30, and 55 gallons. 2. End of barrel wrench opens most standard 2' and 3/4' plugs on tight head drums. This tool can be very helpful in saving time and energy when working with these types of drums. 3. Bung wrench is made of lightweight and durable aluminum material and features a strong, never rust, not easy to break and easy to carry. 4. Barrel wrench key is a tool designed to open and close large industrial drums commonly used in the chemical, oil, and food industries. Fits most drums, water barrel, diesel barrel, fuel barrels, drums of chemicals, and more. 5. A drum plug bung wrench is a tool used to tighten or loosen the bungs or plugs on drums, barrels. Overall, the Aluminum Drum Wrench is a valuable tool for anyone working in an industry that uses large industrial drums.