Dual alternating tooth geometry and thin-wall construction help Milwaukee® durable nine piece annular cutter set cut up to 15% faster than the competition. With 20% 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® proprietary High Speed steel with three hardness zones minimizes breakage and helps the bits last longer. Each cutter comes with a 3/4 in weldon shank, which is ideal for use with most small magnetic drill presses and large magnetic drill presses with the correct arbor. Milwaukee® 49-22-8410 Annular Cutter Kit, 2 in D Cutting, 9 pc, For Use with Magnetic Drill Press, HSS