Concentric 6" Search Coil for MX Sport and MX7. Provides better separation between targets in moderate to high trash areas and excellent pinpointing. Compared to larger search coils… improved sensitivity to physically smaller metal targets provides improved performance in moderate to high trash and a physically smaller foot print for working around obstacles. Impressive depth for smaller coil with high sensitivity to small targets like earrings and cut coins. Flat-bottom construction for maximum depth and slim profile.coins. Flat-bottom construction for maximum depth and slim profile.