Eraser Pen type, metal body with coarse grade FybRglass brush. Blue. With pen clip. These tools are suitable for a wide variety of cleaning, burnishing and polishing applications including electrical contact cleaning, mold cleaning, rust removal, deburring small metal parts, erasing printing marks, cleaning contact pads and fingers of printed circuit boards, and much more. - Eraser coarse FybRglass eraser brush for cleaning, burnishing and polishing of less fragile parts.