Find gold and treasure is not easy especially underwater hunting. Metalprobe not only speed your recoveries but will also can help to locate the traget before hard digging. To pick out proper pinpointer we need to compare the current models that are available and learn how they differ in both features and performance. Nomal metal detector has a larger search coil dia. 8-10 inch which acts as a general screening device to locate the target. In fact even the best underground metal detector the detection depth and metal size is limited. some top detectors can detecting 40 inchs depth for one coin Dim. 0.8 inch. For over 8 year developing underwater metal probe. As professional metal detecting tool it can finding small gold nugget ≥ dia. 0.18 inch underwater as deep as 10 - 100 feet