I have tried different sharpeners over the years and was always disappointed. Then DH saw this one on
Amazon and talked me into trying this out with the idea I could always return it. It is True Sharp electric rotary blade sharpener. It finally turned out to be a keeper. There are two stones...I always do mine with the coarse stone first and then finish off with the other stone. I use a timer that counts off in seconds for accuracy. Also I discovered at the same time it does make a difference as to what rotary cutting mat you use. The white ones from Joann Fabrics do wear out the blades fast. Switched to a much smoother mat (got the Big Mat from sewingemporium.com) and discovered I don't have to sharpen my blades as often. No regrets in getting these tow items. Good luck, Don!