Jewelers use Shots and Soap for Magnetic Tumblers. No more bombing or stripping! Quiet and smooth operation, Heavy duty construction, Meant for years of use. Finishes your work in approximately 20 minutes. The RJS Magnetic finisher is made to make quick work of your finishing needs with little effort. Small steel pins are driven by magnets at high speed in the barrel around the jewelry pieces. Thanks to the size of the pins (0.4 mm dia. x 5 mm long) they get into hard to reach places never before achieved in other tumblers. The RJS Magnetic Tumbler is safe for the most demanding jobs and will not damage details on the jewelry.