For ignition and general purpose measuring. The sizes, both decimal and metric equivalent, are permanently etched on each blade.

Contains - Thirty-two - 3" x 1/2" blades with thicknesses .0015, .002, .0025, .003, .004, .005, .006, .007, .008, .009, .010, .011, .012, .013, .014, .015, .016, .017, .018, .019, .020, .021, .022, .023, .024, .025, .026, .028, .030, .032, .035 and .010 brass blade for transistorized engines