<p>The mounting is an arbor (16) or arbor sleeve (10) having a non-symmetrical outer mounting surface (24) onto which is mounted a cutting blade (21) which contains a similarly configured mounting hole (52). The arbor (16) or arbor sleeve (10) is designed for use with a cutting blade (21) having a mounting hole (52) which, when viewed from one side of the blade is the same as the outer mounting surface (24) and which viewed from the other side of the blade is not the same. The use of the arbor or arbor sleeve of the present invention with a cutting blade having these characteristics results in the blade being mounted on the saw in only one orientation.</p>
