We use these pens alongside dyechem when working on metals. Less mess and easier to get into smaller spaces than a paint brush style applicator can, and just saves time and is a cleaner product to wipe down after usage. We thought these were extinct and no one could find them for the purposes we use them for and once we did I have now ordered close to 30 of them just in case they ever do discontinue. Keep these in stock as more and more metal fab guys will be wanting them as they are exposed more in the training process in the fabrication area we work in. And they keep the same consistency from the first swipe to the last. I can’t say enough good things about these brush style pens. In fact I’m going to order another 20 just so I have enough for the next ten years. Thanks pens and pencils for always having the hard to find goods that us craftsman appreciate and at affordable prices as well. Accept no substitutes when it comes to brush sharpies. These cannot be beat.