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Standard Wiring Pencil (TCW) RRP-104

£12.24

This Standard Wiring Pencil or wiring pen (TCW), RRP-104, without brake is preloaded with a Tinned Copper Wire (TCW) bobbin or wire spool (non-insulated).

The original Roadrunner® Wiring Pencil prototyping wiring tool, is well balanced and easy to handle, with a long-life stainless-steel tip for high-speed accurate wiring, even in the most confined areas.

Wire feed tension is varied by gently adjusting the bobbin supports or adjusting the angle of the device during the wiring process. A full, ready to use Tinned Copper Wire (TCW) bobbin of wire or wire spool is supplied with each pencil.

This wiring tool, is recommended for: entry level and advanced students, technicians or hobbyists for the assembly and wiring of simple electronic circuits; end of line or Field Service for PCB or PWB track repair, rework, shorting links or modifications.

Replacement TCW Bobbins : Part No.: 

Wire Diameter: 0.25mm or 35swg

RRP-T-104 PK2

 Safety Note:  The Tinned Copper Wire (TCW) used in this wiring pencil is NOT INSULATED. If TCW wires touch each other they will short out!

For Wire Specifications, read:

Soft Tinned Copper Wire Data Sheet

Frequently Asked Questions

What is the RRP-104 Standard Wiring Pencil?
▶
The RRP-104 is the original Roadrunner® wiring pencil preloaded with a 0.25 mm tinned copper wire bobbin, featuring a long-life stainless-steel tip for high-speed, precise wiring in confined spaces.

How do I control the wire tension without a brake?
▶
Tension is adjusted by gently manipulating the bobbin supports or varying the angle of the pencil during use, allowing you to fine‑tune wire feed for smooth operation.

What tasks is the RRP-104 recommended for?
▶
Ideal for beginners and advanced users, including students, technicians, and hobbyists, for discrete circuit assembly, PCB track repair, rework, shorting links, and modifications in the field or lab.

How can I replace the TCW wire bobbin?
▶
Unscrew the rear cap, remove the empty TCW bobbin, insert a new RRP-T-104 bobbin (0.25 mm), replace the cap, and adjust the bobbin supports to set the desired tension.

Are there safety considerations when using this pencil?
▶
Yes. The tinned copper wire is uninsulated—if adjacent wires touch, it can short. Keep wires neatly separated and avoid crossing without insulation to prevent shorts.

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