If you’re using an 8" grinder with aluminum oxide wheels to sharpen your turning tools, you’ve probably gone through more than a few of them. Aluminum oxide wheels are relatively inexpensive and do a nice job but now there’s something better—Woodcraft’s WoodRiver 8" Diamond Grinding Wheel. This 8" diameter wheel consists of a full 4 lbs of 7/8" wide aluminum plate which flares to 1" at the rim. The resin-bonded rand is loaded with diamonds and the 120-grit surface cuts quick and leaves an impressive finish behind and we’ve not yet been able to burn a tool—despite repeated efforts! In our durability testing, extensive tool sharpening left this wheel looking barely used. Standard 5/8" arbor hole.