The Fein StarlockPlus HSS Saw Blade Set features the 183 and 184 Starlock E-Cut Long-Life saw blades, 019 Carbide StarlockPlus file, and small blade lengths that are used to get into the hard to reach areas in different installation jobs. It also has the StarlockPlus mount that fits all popular multifunction tools. This M-Cut saw and file set includes: (1) 3/8" Long-Life saw blade, (1) 13/16" Long-Life saw blade, and (1) 3/8" carbide file.