A UDS aka Ugly Drum Smoker is a upright smoker that is made from a food grade 55 gallon steel drum. Components used to make one include 22.5" weber grates, 22.5" weber grill lid however some use the removable lid that some barrels come with. The most common form of firebox is expanded metal formed around a weber charcoal grill with 3" bolts to raise it from the bottom of the smoker. Other parts needed are ball valves assembled at the bottom of the barrel for air intake adjustments, thermometers for temperature observations and optional wheels for ease of movement.