Ink Eraser for polishing circuit boards (PCBs)

The perfect tool for your kit - the ink side (blue) is just abrasive enough to remove all the crud from your circuit board edge connector/traces, and the pencil side (pink) buffs it up nicely.

Great for restoring EM (Electro-Mechanical) and SS (Solid State) pinball, jukebox, and arcade game contacts of all sorts including wiper board copper traces, edge card connections, etc.