IDC Punch Down Tool - 

A convenient tool for professionally installing wires from computer, telecom and network cables into patch panels, telephone sockets, keystone faceplates and more, without soldering. The tool uses a pressure-based mechanism to secure wires into compatible connectors while breaking the insulation and establishing contact. The spring-loaded blade automatically trims excess wire in the process. A pull-out hook and blade are incorporated, to remove existing wires from connectors and to trim and strip new wires as required.