Black Special Purpose Data Card Pen:
The Black Data Card pen will not wipe off with sweat, rain or water. It is however easily removed with alcohol pads or the White Eraser Data Card Pen.
White Special Purpose Eraser Data Card Pen:
The White Eraser Data Card Pen is designed to work directly with the ink in the Black Pen. When applied to the data card the White Pen's ink will allow the black ink to be erased. The White Pen will provide excellent performance and has no similar counterparts other than the alcohol patches. If you do not like carrying the alcohol pads around the White Pen is the best option.
We selected these Special Purpose Pens after a long process of testing to insure the best performance possible for the end user. The Black pen will last and will preform at its best longer than any other pen available.