Mark materials such as hardened steel, ceramics and glass. Carbide scribe features an alnico permanent magnet that is perfect for picking up small parts or steel chips. 6" long. FeaturesTungsten carbide tip marks hard materials including hardened steel, ceramics and glassAlnico permanent magnet picks up small parts and retrieves steel chips from hard-to-reach placesScriber point reverses for safetyPoint is replaceable