The Norton commercial line of knife sharpeners is trusted by professionals. They are a workhorse in kitchens and butcher shops worldwide. Norton commercial sharpeners have been tested and refined over years ensuring you professional results every time.. Norton commercial sharpeners are easy to use and a very durable sharpener.Norton sharpeners sharpen American and Asian style knives and ensure precision angle control every time.The Model IM313 is the largest and preferred by professionals. The Model IM200 and IM50 are the same commercial grade but are smaller making them a favorite for the home. We stock all popular Norton Commercial Sharpeners and many include Free Shipping!