Utilizing a duel alternating tooth geometry and a thin wall construction Milwaukee's Annular cutters cut up to 15% faster than the competition. The propriatary steel reduces breakage, and extends the life of the bit. All Milwaukee annular cutters have a Weldon Shank, perfect for use with most small magnetic drill presses as well as large magnetic drill presses with correct arbor. Annular Cutter Kit, Number of Pieces 9, Dia 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1 1/16 In, Cutting Depth 2 In, Shank Dia 3/4 In, For Cutting Steel Plate Stainless Steel, Cast Iron, Includes 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1 1/16 Inch Bits, 2 Pilots Bits, Case