Goldmaster V-Sat & Goldmaster III, Goldmaster 4B and GMT accessory search coil. Elliptical 4x6 inch "DD" design provides superior performance in extreme ground, better sensitivity to physically smaller metal targets, performance in extreme trash and physically smaller foot print for working around obstacles. Longer but narrower detection window compared to similar sized search coils. Finds the good stuff in areas littered with trash.
4X6 GMT DD