Feeler Gauge 12 Blade Offset - Dual Marked Imperial graduated 12 blade feeler gauge. Dual marked in Imperial and Metric. 45-25mm Offset tips are essential for checking tolerances on OHC configurations and suitable for other applications where straight blades will not fit. Sizes 0.008" to 0.026" (0.203 to 0.660mm). Blade dimensions 95 x 13mm (45-25mm offset). Lifetime guarantee*.