Simple tool and seems to work. Was disappointed that Motosport couldn't answer what wrench fit the filter on my Yamaha. I measured the filter as best I could and hoped for the best.
Fix like a charm, great quality would highly recommend to anyone.
Seized onto the 1st filter I used it on. I can't wiggle it off with a 6" extension inserted. This is stamped out of thin sheet metal, with a shallow 3/8" fitting tacked on. I'm going with a cast aluminum version by Amico as a replacement.
Fits well and made the change of the filter very easy.