The product features a safety lock, making it safer to use. With the blade calibration screw, fine adjustments can be made if the stripping is not clean after repeated use. With three holes, the outer layer of the optical fiber is removed from the large hole, the second layer from the middle hole, and the final layer from the smallest hole. Sharp blade, clean stripping without damaging the optical fiber. Hardened steel body with black oxidation treatment. Repairable.