10 Inch DD Search Coil for Fisher Gold Bug Metal Detectors. This 5x10 solid DD coil has excellent depth and unbelievable target separation capabilities and has become the go-to coil for many. This coil was designed for the Gold Bug series and it has incredible sensitivity to small targets. It's a real must-have for gold prospectors, and the solid construction makes it great for field stubble. Excellent for coins, relics and jewelry hunting and the standard 6.5 foot cord has shallow water hunters cleaning up! This coil is compatible with the Gold Bug, Gold Bug Pro, Gold Bug DP and F5.