Draper-Dual-Reading-Long-Blade-Combination-Feeler-Gauge-Draper-52339-One-piece-combination-gauge-with-26-dual-marked-blades-150mm-long-hardened-for-long-accurate-life-Each-blade-is-marked-with-its-size-&-folds-into-a-case-with-thumbscrew-This-gauge-is-particularly-useful-for-use-on-agricultural-&-heavy-commercial-engines-Draper-Dual-Reading-Long-Blade-Combination-Feeler-Gauge