Circuit design meets hands-on convenience with this silver-based conductive ink pen. Perfect for pedal builders, electronics enthusiasts and repair technicians, it lets you draw functional traces directly onto circuit boards, epoxy, glass, plastic and metal surfaces. Whether you're prototyping custom layouts, bridging broken connections, creating jumpers or shielding sensitive components, this tool eliminates the need for traditional etching methods. The 4-gram capacity delivers reliable performance across multiple projects. Ideal for everything guitar pedal modification and building.