U.S.-made, premium, right-angle, Korner zirconia and ceramic flap discs are available from Weldcote, a division of Zika Group. U.S.-made, premium, right-angle, Korner zirconia and ceramic flap discs are available from Weldcote, a division of Zika Group. The flap discs feature a unique design where the abrasive material wraps over the edge of the…