Handy metal compass saw. The removable saw blade can be set at 8 different angles by an adjusting screw in the handle. Complete with 12" Sandflex bi-metal hand metal saw blade, 24 teeth per inch. Exchangeable Sandflex bi-metal spare saw blades are available separately: 321-7-SB: Special carbon steel blade with hardened teeth 7TPI, for sawing non-ferrous metals, plastic, sheet material and wood 321-18-SB: Sandflex bi-metal blade 18TPI for sawing thick metals 321-24-SB: Sandflex bi-metal blade 24TPI for sawing thin metals.