These chisels came with some kind of coating that had to be soaked in acetone for nearly 20 minutes to remove. They need to be sharpened immediately. They take advantage of it fairly easily, which leads me to suspect they won't stick with it for long. I have an old Stanley with black handles that I have used for many years and the difference between the old and the new is quite noticeable (the old is much better). Time will tell I think.