You are buying one lot of three (3) Woodruff key milling cutters KY 250 302 1/2. The diameter of the cutter is 5/16", the width of the cutter is 3 3/32", total length is 2 1/4", shank length is 1 1/8", and diameter shank is 1/2". These are new but have been on shelf awhile. They are packed in nice plastic tubes.