It is a set of 4 Everlink connectors with control wire for Compact NSXm and PowerPact B devices.They use the Everlink system with creep compensation (Schneider Electric patent).Everlink system makes possible to achieve accurate and durable tightening torque.For copper power connections, the current range is from 15A to 160 A and the torque is 5 N.m /- 0.5 (2.5 to 10 mm²).For aluminium power connections, the current range is from 15A to 100 A and the torque is 9 N.m /- 0.5 (16 to 95 mm²).