Our 3lb Metal Cleaning, Barreling Tumbler Machine is fine tuned for for coin cleaning, or metal detector finds cleaning. It comes with a plastic barrel is an excellent machine for barreling metal polishing and jewellery cleaning. The kit comes with a special finned barrel to help turn the metal and coins over. A pack of steel media and barrelbrite powder work together for an effective and gentle clean. Removing rust, dirt and bringing the natural shine back.