Details:- 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 – For ignition and general purpose measuring – Both decimal and metric equivalents are permanently etched on each blade