Not only does our diamond steel feature a surface fully covered with DeBeer’s diamonds, it’s also made from a solid, well heat treated and tempered premium steel. The benefit you’ll get is a steel which will work extremely well for quite many years. The independent test institute CATRA in Great Britain has compared our steel with diamond steels from other manufacturers and found that our steel provides a ten times longer sharpening life and metal removal – after more than 40.000 strokes it still worked while the others had given up after 4000 strokes! So, if you’re looking for a professional diamond sharpening steel you know the source.