Punchdown, BladesPunchdown tools and blades are instruments or tools that are used to connect wires or cables to terminal blocks or other types of connectors. Punchdown tools are handheld devices that have a spring-loaded mechanism that is used to push the wires or cables into the connectors, while a blade on the tool cuts off any excess wire. Punchdown blades are the replaceable, cutting end of a punchdown tool that is used to cut the excess wire. Punchdown tools and blades are commonly used in the field of telecommunications, where they are used to connect wires or cables to phone jacks, patch panels, and other types of connectors. They are also used in other fields, such as networking and electrical engineering, where similar types of connections are needed.