This product was not my best purchase. I like to write down in my books for work in a bicenfine too marker. Unfortunetly, this was not my best purchase for the job. The product itself down what it says it does, however it is not paper friendly as it bleeds through as well as I feel like it spreads out a little when writing on softer surfaces. It would be great for labelling, however it was not good for the job I needed and hat is not what the product advertised to do but I bought I'd give it a go anyway as it was affordable. It's nice to have these on hand, but I will be repurchasing another black fine tip for my personal job.