Corrosion Buster PenRemoves rust and corrosion from hard-to-reach areas without chemicals or solvents. Designed for electrical connections, marine radios, fishing reels, and precision equipment. The ultra-fine glass fiber tip cleans recesses that sandpaper cannot reach.Directions:Rotate the body of the pen to adjust the fiber length according to your cleaning needs. For more aggressive cleaning, shorten the fibers. After use, retract the fibers to protect the tip and ensure longevity. table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Truck Freight: No Oversized: No