These wheels are amazing! They can be attached and used with any portable drill, they outlast wire wheels ten to one, and are much safer to use. They are by far the best cleaning wheels we have tried. Depending on grit chosen you can safely clean and prep the wood and metal parts of your trunk project in one step! Choose an extra coarse grit for heavy rust, tarnish, or corrosion. A coarse grit will handle moderate amounts of rust and corrosion. Use the medium/fine grit for mild cleaning and polishing. They are also excellent on any hardware or metal items such as drawer pulls, hinges, metal beds, etc.