Feeler gauge set: made of 65 manganese steel, each measuring feeler gauge has 32 blades thickness; Foldable feeler gauges, easy and convenient to take and store | Easy identification: dual marked metric and imperial, 0.001 inch/ 0.03 mm to 0.04 inch/ 1 mm, the numbers of size are etched into feeler gauge for easy identification | Metric sizes (mm): 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.13, 0.15, 0.18, 0.20, 0.23, 0.25, 0.28, 0.30, 0.33, 0.35, 0.38, 0.40, 0.45, 0.50, 0.55, 0.60, 0.63, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 1.00 | Inch sizes: 0.001, 0.0015, 0.002, 0.0025, 0.028, 0.003, 0.0035, 0.004, 0.005, 0.006, 0.007, 0.008, 0.009, 0.01, 0.012, 0.013, 0.014, 0.015, 0.016, 0.018, 0.02, 0.022, 0.024, 0.025, 0.026, 0.028, 0.03, 0.032, 0.034, 0.034, 0.040 | 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