The 58372-1 is a 2mm common termination Head Assembly with wire inserter - Forces unstripped wire into the two slotted beams of the contact, wire insertion rod and adjuster - Acts as a piston and regulates travel of the wire inserter, carriage - Slides right and left in head assembly and automatically advances the connector after each termination, drag - Prevents connector from moving out of position after it has been advanced, connector slot - Opening into which connector is secured in head assembly, adjustable stop - Controls the size of the connector slot, permitting different size connectors to be secured in head assembly, wire guide - Open channel into which unstripped wire is inserted and bottomed for terminating.