Drums with different hole patterns that have an OD of 4 3/16 that some of the kart builders back in the day when they built karts in the USA used. Brake bands made by Comet, Thomas Mfg, and Knott fit these drums. We also could make them with only the center hole and you could drill your own hole combination that will work for you. Or no center hole if that is what you want. All they are is the clutch drum with a 4" ID. You can also use them for ash trays, part holders, swimming pools for mice, let your imagination run wild.