Punch down tool, Compact size punch down tool with spring mechanism for impact cutting of wire. Built in hook for pulling wires, and flat tip screwdriver. Punch down tools, also known as a krone tool, is a hand tool used to connect telecommunications and network wires to a patch panel, punch down block, keystone module, or surface mount box. The punch down part of the name comes from punching a wire into place using and impact action. When the punch down tool connects a wire the the blade cuts off the excess wire during the punch down.