Twin Set: Ten blade feeler gauge for automotive use. Suitable for use on ignition points, spark plug gaps and tappets. Sizes: 0.0015 | 0.002 | 0.003 | 0.004 | 0.006 | 0.008 | 0.810 | 0.012 | 0.015 | 0.025. Metric: A 10 bladed feeler gauge: 0.05-0.80mm. Suitable for use on ignition points, spark plug gaps and tappets. Ten blade feeler gauge for automotive use. Sizes: 0.05 | 0.10 | 0.15 | 0.20 | 0.30 | 0.40 | 0.50 | 0.60 | 0.70 | 0.80mm. Metric sizes. Fold away sleeve.