I just won a 6.5" square cutting ruler @ the Fort Worth Quilt Show! It has a sharpening blade on one side. I am not sure if it works or not. I have only used it once. I am using an old blade with it just to be sure that it doesn't actually ruin my good blades. I will be sure to let the Board know how it goes. It is by Sullivans. It is called "the Cutting Edge". See it at...
www.sullivans.net/usa