It permits "permanent" coverage of any information permitting you to avoid using the discard recycle services for every page or documents you are permanently discarding.
I am quite pleased with these "Markers". I have been using the TRU RED HIGHLIGHTERS in yellow and thought I would the "MARKERS" a try glad I did and also the price is good.
Best permanent marker I've used so far.Not sure how long they last(I've only used it a few times so far) but the ink comes out bold and dark and doesn't smell like Sharpies do. Great for lettering and drawing and labeling!
I use permanent markers everyday at Fedex Ground marking packages before taking off to go deliver them on my route and a fellow coworker recommended them to me and sure enough he was right these markers outlast sharpies you get Bang for your buck. Hands down better option than sharpie