Wubbers X-Large Round Mandrels add two new sizes of circles that you can use to quickly make large tubes or even your own rings easily out of sheet metal. Coil from 28 to 12 gauge wire with these strong tools without having to worry about putting any pressure on your hands or wrists. The pliers do all the work so that the tool—not your wrist—provides all the leverage needed to effortlessly bend even 12 gauge wire.