Greenlee Quick Change Bi-Metal Hole Saw Kit. SAE Hole Saws: 7/8 - 1/2" Conduit 1-1/8 - 3/4" Conduit 1-3/8 - 1" Conduit 1-3/4 - 1-1/4" Conduit 2 - 1-1/2" Conduit 2-1/2 - 2" Conduit Arbor allows for rapid mounting or removal of hole saws. Brand New