milwaukee impact driver (tool only no battery) converted to a 4 horn, train horn. Very loud. All my train horns use a custon 3d printed spacer to fill the void between the impact body and the compressor to give a seamless look and lock the compressor in place... check out my other auction for 4 horn options, or message me for other tool brands.. thanks for looking , and feel free to message for bulk orders, or any questions
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