The gap measuring tool is flexible, so it is easy to get into hard to reach places. The bundle of blades are able to be kept together so you can quickly pick the gauge you need or you can unscrew the finger nut and take the feeler out that you need to use so you do not have to wield the whole set. ?Measuring Range: 2 Different units of measuring: Dual marked metric and imperial, 0.0015 inch/ 0.04 mm to 0.035 inch/ 0.88 mm, the numbers of size are etched into feeler gauge for easy identification. Inch Sizes: 0.0015, 0.002, 0.0025, 0.003, 0.004, 0.005, 0.006, 0.007, 0.008, 0.009, 0.010, 0.010, 0.011, 0.012, 0.013, 0.014, 0.015, 0.016, 0.017, 0.018, 0.019, 0.020, 0.021, 0.022, 0.023, 0.024, 0.025, 0.026, 0.028, 0.030, 0.032, 0.035 ?Metric Sizes (mm): 0.04, 0.05, 0.06, 0.08, 0.10, 0.13, 0.15, 0.18, 0.20, 0.23, 0.25, 0.25, 0.28, 0.30, 0.33, 0.35, 0.38, 0.40, 0.43, 0.45, 0.48, 0.50, 0.53, 0.55, 0.58, 0.60, 0.63, 0.65, 0.70, 0.75, 0.80, 0.88 Specifications: ?Measuring range: 0.0015 inch/ 0.04 mm to 0.035 inch/ 0.88 mm ?Material: steel (Constructed from hardened tempered steel with a lube oil coating to prevent pitting and corrosion) ?Blades: 32 pieces Package Content: 1 x Feeler gauge 1 x Store bag ?Warm Notice?- There is Some Anti-rust Oil on the Stainless Steel Feeler Gauge to Prevent it from Rusty, Please don't Worry About That.