Brand New VViViD 12 Blade Steel Tappet Gauge 4 Inch Blades Dual Marked Metric & Imperial Measuring Valve Feeler Hardened and tempered high quality 12 4-inch steel blades. Coated with anti rust oil to prevent any rust. Offset ends provide convenient access to confined areas. The foldable design of the tappet gauges makes them easy to store and use as needed. Used to measure valve tappet clearances with easy identification. Decimal and metric sizes etched on each blade. Metric sizes: 0.203mm, 0.254mm, 0.305mm, 0.330mm, 0.356mm, 0.381mm, 0.406mm, 0.457mm, 0.483mm, 0.508mm, 0.635mm and 0.660mm. Inch sizes: 0.008 in, 0.010 in, 0.012 in, 0.013 in, 0.014 in, 0.015 in, 0.016 in, 0.018 in, 0.019 in, 0.020 in, 0.025 in and 0.026 in.