Profile: J. J. Kagan & Co., Inc. is a designer & manufacturer of kagan ring sizer and ring roller. Our ring roller provides uniform pressure on the shank as it rotates against the roller die for perfect stretching. Eight polished roller dies are included that fit ring shanks in half-round, knife-edge and flat styles up to 5mm wide. Our ring roller features include enlarges stone set rings without disturbing the heads, modifies design shaped rings easily, builds store traffic & extra sales and resizes stone-set rings.