ce577368_ight_For_The_Ground_Conditions__Double_D_Coils
Larger Gold Nuggets [Monoloop Coils] The larger the coil the deeper the nugget that can be found [Double D Coils] 
The larger the coil the deeper the nugget that can be found. Will not penetrate as deep as a Monoloop of same size. But will remove ground noise,
Metal Detector Coils Get Them Right For The Ground Conditions
Double D Coils