These are good stones with a solid bite on hardened steel but they tend to wear fairly quickly. The non-diamond stones may not cut hardened steel as quickly but will offer more use in the long run. I lubricated them with water while using and was happy with the results. Very dull carbon steel (5160, 52100, etc) these work very well
Best product by far i have come across, the stone does the job but i prefer the diamond coated stones are better for my knife.
So easy and mobile
My original order arrived quickly. A subsequent order took a little longer, but eventually did arrive. Had a small issue that cust aervice resolved quickly and politely. The system itself is amazing, and delivers great results.
honing fine, hopefully lasting. Ask me in 10 years
3 blades sharpened and they are wearing out already. Will not purchase again.