In this work a fast Non-iterative method for EM imaging of surface-breaking defects in a conductive specimen is presented. It exploits the Monotonicity Property in the frame of Eddy Current Tomography (ECT). The imaging strategy is based on a criterion for checking whether a prescribed elementary anomaly (test domain) is included or not into the unknown anomaly. The reconstructed anomaly may be evaluated by comparing the regions given by the union of test domains completely contained into the anomaly and those given by the intersection of test domains completely containing the anomaly. The strength of the proposed technique is represented by its low computational cost, suitable for real-time applications.