Product Features:Contains: 12 straight steel blades, 6 straight brass blades, 6 wire test loops, electrode adjuster.Decimal and metric sizes.Useful for tune ups.Steel Blade SAE Sizes: .010, .012, .015, .016, .017, .018, .019, .020, .022, .024, .025 and .026Steel Blade Metric Sizes: .254, .305, .381, .406, .432, .457, .483, .508, .559, .610, .635 and .660 mm
