Case Prep LNL Sonic Cleaner Description Hornady Manufacturing has taken cartridge case cleaning to the next level with the Lock-N-Load Sonic Cleaner. A combination of intense ultrasonic cleaning action and a unique cleaning solution, One Shot Sonic Clean, provide an extremely effective and efficient method to remove carbon residue and other foreign materials from the entire case. Unlike tumblers, this sonic cleaner quickly cleans the inside of the case as well as primer pockets. The ultrasonic action creates microjets that blast carbon buildup off cases, small gun parts and equipment. The Lock-N-Load Sonic Cleaner can hold up to two hundred .223 cases or one hundred .308 cases. No other cleaning tool on the market even comes close.