Inch sizes: 0.0015, 0.002, 0.004, 0.005, 0.006, 0.007, 0.008, 0.009, 0.010, 0.011, 0.012, 0.013, 0.014, 0.015, 0.016, 0.017, 0.018, 0.019, 0.020, 0.021, 0.025, 0.027, 0.030, 0.040 inchesVersatile: Our gap measuring tools are used to measure gap width/thickness and are a practical tool in the toolbox of designers, engineers, mechanics, such as measuring spark plugs, guitar gaps, checking valve tolerances, point gaps, correct nut slot depths, fret slot width, string to fret clearances, piston and cylinder and other hardware installation workMetric sizes (mm): 0.038, 0.051, 0.102, 0.127, 0.152, 0.178, 0.203, 0.229, 0.254, 0.279, 0.305, 0.330, 0.356, 0.381, 0.406, 0.432, 0.457, 0.483, 0.508, 0.533, 0.635, 0.686, 0.762, 1.02mmHigh Quality Material: The feeler gauge is full of toughness, the whole piece has passed the heat treatment, high hardness, good elasticity, wear resistance, can be used for a long time; The surface shell of the measuring tool is polished, the overall metal has a texture, the surface is smooth and bright, and the touch does not hurt the handFeeler Gauge Set: Our feeler gauge set consists of 25 blades, each feeler gauge has a laser engraving metric/imperial reading, clear and easy to read. The tail of the feeler gauge is fixed by the nut, easy to use, folding, easy to carry and store