For Morse Advanced Edge Arbors. 7/16" Shank Size. Use with diameters up to 1-1/4". M. K. Morse products are manufactured in Canton, Ohio, in one of the industry's most advanced production facilities. The whole business is making saw blades for professionals that last longer, cut smoother, and do every conceivable job. Their engineering and production employees are very skilled and work in a fully integrated manufacturing facility that allows them do everything they need, but make their own steel. This gives the company total control of their processes making a quality product that will meet product deadlines.