Feeler gauge made of stainless steel with 32 different thickness blades. 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 PLEASURE: Foldable and flexible, this engine shim set will allow you to very quickly and accurately measure the spark plug gap and adjust the valve rocker arm clearance . you can easily take it with you and store it in your garage Anti-rust: gauge cover with anti-rust oil, never rust and easy to open Use: The game of wedges can be used for auto/motorcycle mechanics but also for electronic products (3D printer) and musical instruments: guitar/acoustic/bass, perfect for measuring spark plug gap and adjusting valve rocker arm play< /p> Blades: 32 Gauge Dual Marked Stainless Steel (Metric/Imperial) 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, 0.26, 0.28, 0.30, 0.33, 0.35, 0.38, 0.40, 0.433333333333333. 0.455 and 0, 0.48, 0.50, 0.53, 0.55, 0.58, 0.60, 0.63, 0.65, 0.70, 0.75, 0.80, 0.88 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, 0.01422222.015, 0.016, 0.017, 0.018, 0.020, 0.020, 0.020, 0.020, 0.020, 0.020, 0.020, 0.020 0.022, 0.023, 0.024, 0.025, 0.026 , 0.028, 0.030, 0.032, 0.035 Package content: 1 setting gauge (32 blades)