This Detech 13" Ultimate Search Coil is for use with the Teknetics Gamma, G2 , Fisher GoldBug and Gold Bug Pro metal detectors. By upgrading to this coil you will achieve the best depth and most accurate pinpointing. Compared to traditional DD coils, the patented Ultimate coil technology provides you with more stable operation, better ground balancing and the most accurate target identification. Search coil cover included.