DMT 325 aka The Wonder Tool.
Last year, I walked into Woodcraft to buy the one and only hone I would ever need for the rest of my shaving life; the Norton 4/8.(I was very wrong in this assumption!!!) I was about to spend 80 bucks on a basically a rock and this seemed so crazy to me. I knew, I would need a way to lap my new uber-stone and began looking around at my options. There were lapping plates in excess of two hundred dollars, a DMT for fifty, a piece of granite for sandpaper, and the twenty five dollar Norton lapping stone. These prices seemed insane so I went with the cheapest option; the Norton. The Norton lapper was a decent stone, but eventually I upgraded to a DMT 325.
IT WAS WORTH EVERY PENNY!!!!! This plate can do so freaking much you would not believe! It is an excellent lapping stone that never needs to be flattened unlike the Norton. If you plan on doing restoration razors get a DMT and skip the Norton. Besides lapping duties this stone will; re-contour heels, flatten out protruding shoulders, take out chips, breadknife in a breeze, and restart that long gone bevel your breadknifing destroyed. It is just so very versatile and useful I cannot praise it enough. If you are new to honing and need a lapping means buy this stone. Save yourself the mistake I made. The only real gripe I have about my DMT is that it will rust somewhat easily if not dried after use. I found that out after lapping a stone and being so excited I forgot to go back for the DMT. That problem is easily fixed by making sure to dry it after every use.