Bi-metal hole saw kit M3 or M42 Bi-metal Hole Saw, Maintenance's Kit, Sharp and long-lasting tools Bi-metal hole saw kit ( Bi-metal hole saw maintenance kit )M3 or M42 Bi-metal Hole Saw KitIncludes: 19mm, 20mm, 22mm, 25mm, 29mm, 32mm, 35mm, 38mm, 44mm, 51mm, 57mm, 67mm, 76mm hole saws3/8" Hex, 7/16" Hex, and Hex ExtensionAluminum display case Sizes in inch are also available.