For measuring a variety of clearances. Gauge set containsflat and wire loop blades, non-magnetic brass blades andspark plug gap adjusting tool. Steel blades include:0.010, 0.012, 0.015, 0.016, 0.017, 0.018, 0.019, 0.020,0.022, 0.024, 0.025, 0.026.