I use 3 of them for reloading. You'll probably need a more aggressive tumbling media than ground walnut hulls or corncob media like we use on brass cases. Rotary-type tumblers like the kind used for rock polishing might work better for some types of parts cleaning.
Try
www.midwayusa.com for price comparisons on tumblers. They're big reloaders' equipment suppliers, and they make their own line of tumblers under the Frankford Arsenal brand, I believe.
Jerry