BEADALON-Jump Ring Mandrel. A tool perfect for making jump rings on the go. This package contains two mandrels: the larger size will make jump rings in sizes 6.0mm; 7.3mm; 8.2mm; 9.0mm; and 10.0mm and the smaller one will make sizes 1.5mm; 2.0mm; 3.0mm; 4.0mm; and 5.0mm). Each tool features a no-slip grip and measures approximately 5-1/2in long. Jump rings not included. Imported.