The Fisher 10 inch Elliptical DD Metal Detector Coil is designed for maximum sensitivity to small gold nuggets. It is compatible with Fisher Gold Bug, Gold Bug Pro and Gold Bug Pro DP metal detectors and is ideal for treasure hunters looking for gold. With its elliptical shape, the coil provides maximum coverage and ground penetration for efficient and effective metal detecting. The DD (Double D) configuration also helps reduce interference from mineralization for more accurate target identification. Get ready to make some valuable discoveries with this high-performance metal detector coil!