Dual alternating tooth geometry and thin-wall construction help Milwaukee's Annular Cutter cut up to 15% faster than the competition. With 20% thinner walls, the cutter displaces less material for the same size hole, giving you fast, burr-free holes in anything from sheet metal to thick steel plate. Milwaukee's proprietary high-speed steel with three hardness zones minimizes breakage and helps the bit last longer. It comes with a 3/4" Weldon shank, which is ideal for use with most small magnetic drill presses and large magnetic drill presses with the correct arbor. The centering pin (included) is compatible with all 1" depth cutters.