MADE IN USA! This is a industrial strength bead roller made to form a bead on the end of a round tube. The whole bead roller is Electroless Nickel plated . The dies and gears are made of hardened 4140 USA origin steel. The bead roller forms beads in Aluminum and Stainless Steel . The K2 bead roller is rated up to .065 inch or 16 gauge / 1.6 MM thick Stainless Steel.It can bead roll down to a .875 inch / 22mm tube.