A wiring pencil is a tool for making electrical connections.

A small reel

Reel

A reel is an object around which lengths of another material are wound for storage. Generally a reel has a cylindrical core and walls on the sides to retain the material wound around the core...

 of copper wire coated with a special insulating varnish is mounted on the end of the tool. The wire runs down a thin tube in the center of the wiring pencil and the wiring pencil can be used to quickly and tightly wrap it onto connections and take it across the circuit board. Then the connections are solder

Solder

Solder is a fusible metal alloy used to join together metal workpieces and having a melting point below that of the workpiece.Soft solder is what is most often thought of when solder or soldering are mentioned and it typically has a melting range of . It is commonly used in electronics and...

ed; the heat of the molten solder burns the varnish away and completes the joint.

A well ventilated area and/or fume extraction are very important when carrying out this process due to the toxic fumes. Sometimes, where there are many wires, plastic comb-like structures are used for wire management.