Check the listing for details. Dillon Powder Bar Box Bundle - Single + Double Bar Boxes w/ Knob, Magnetic Lid. Condition: New, Made in United States. Listed at 33.99 USD. Keep your Dillon powder bars safe, organized, and ready to go. This newly redesigned storage case holds two powder bars with an attached powder knob, all in a compact, purpose-built enclosure. Magnetic Closure: Magnets added to help lids snap securely into place — no fumbling with loose lids or worrying about cases popping open in your range bag.