The 15 cm HOT double-D search coil offers the same depth search performance as the 20 cm concentric round coil and is better at separating non-ferrous and precious metals from iron in the case of heavy scrapping. It is somewhat more stable than the 15 cm concentric search coil due to the mineralised ground and is also very suitable for beach searching. Our recommendation on old settlement sites and on all soils with alkaline or Magneten mineralisation.compatible with Lobo Supertraq, Tejon, Cibola, Cibola SE, Vaquero and Vaquero2-Germania.