Dual alternating tooth geometry and thin-wall construction help Milwaukee's durable 6-Piece Annular Cutter Set cut up to 15 percent faster than the competition. With 20 percent thinner walls, these cutters displace 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 bits last longer. Each cutter 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 kit includes 9/16 in., 5/8 in., 11/16 in., 13/16 in., 15/16 in. and 1-1/16" cutters, a 1 in. pilot bit (centering pin) and a sturdy carrying case.