The Blumol 9599 is a 15 sizes Bi-Metal Hole Saw Kit. It contains fifteen bi-metal hole saws of sizes 3/4", 7/8", 1-1/8", 1-3/8", 1-1/2", 1-3/4", 2", 2-1/4", 2-1/2", 3", 3-1/4", 3-5/8", 3-3/4", 4-1/8" and 4-1/2". It also has 4/6 tooth variable tooth, 3/16" heavy-duty backing plate and 1-1/8" cutting depth. The kit comes complete with two mandrel and mandrel adapter in a molded case.