First I tried a razor then a brass spoked wheel. To spare you the details, it was a disaster. Then I saw some videos of people using this Roloc disc with great success. I ordered it for delivery the next day and it arrived on time with no problems. The wheels have not let me down. Combined with the grinder and the attachment I bought to hold the disc on the grinder, it was like night and day. He cleaned the block and head like butter!