Tungsten carbide tip marks hard materials including hardened steel, ceramics and glass Aluminum/nickel/cobalt alloy permanent magnet picks up small parts and retrieves steel chips from hard-to-reach places Scriber point reverses for safety Scriber features a tungsten carbide tip that marks hard materials including hardened steel, stainless steel, ceramics and glass Permanent magnet on the etching tool picks up small parts and retrieves steel chips from hard-to-reach places, Weight: 0.04 Pounds, Manufacturer: General Tools