The 9-Piece Annular Cutter Set features dual alternating tooth geometry and thin-wall construction to deliver up to 15% faster cutting than the competition.
The 20% thinner walls displace less material for the same size hole, giving you fast, burr-free holes in anything from sheet metal to thick steel plate. 
The 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 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16" and 1-1/16" cutters, two 2" pilot bits (centering pins) and a sturdy carrying case