1" Cut Diameter, 3" Depth of Cut. These Champion Brand, Carbide Tipped Annular Cutters feature two sets of three cutting tips each with different geometries balancing the cutting forces. This enables higher feed rates and smoother drilling, with better control in structural steel and steel plate. Carbide Tipped Cutters cut holes in cast iron, steel, and ultra hard or exotic alloys with the abiliity to produce overlapping and interrupted holes easily. These are high quality cutters at an excellent price. Please Note:cutters 7/16" through 2-1/4"in diameter have a standard 3/4" shank. 2-5/16" through 4" have an 1-1/4" shank.