The Blumol 9595 is a 5 sizes Bi-Metal Hole Saw Kit. The kit contains five bi-metal hole saws of sizes 7/8", 1", 1-1/8", 1-1/4", 1-1/2". It also has 4/6 tooth variable tooth, 3/16" heavy-duty backing plate, 1-1/8" cutting depth. The kit comes complete with mandrel and mandrel adapter in a molded case.