I got a full set of these when I started woodworking, but switched to Norton stones because they work SO much faster. I haven't tried them on my razors. I've heard of some guys (woodworkers) putting diamond paste on a hard black arkansas stone to help it put a super sharp edge on a chisel in little time. I've been meaning to try it, with chisels and razors, but just haven't got around to it yet.