o These are made to exacting tolerances for angle, size and cut of each tooth.o They are used for cutting metals and other hard materials.o These have uniformly set teeth to reduce binding and breakageo High Speed Steelo Set Includeso 144 piece,12 different sizes,12 blades of each size,6/0, 5/0, 4/0, 3/0, 2/0, 0, 1, 2, 3, 4, 5, and 6,Blades measure about 5 1/8 inches long