Feeler gauge made of stainless steel with 32 blades of different thickness. Foldable, easy and convenient to take and store. Easy identification: double marking with metric and imperial measurements, 0.0015 inch / 0.04 mm to 0.035 inch / 0.88 mm, sizes are engraved in each blade for easy identification. Sizes in inches: 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. Sizes in metric (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. Perfect shim set for measuring the spark plug gap and adjusting the valve rocker arm clearance.