Discover excellent depth and great target separation with your Fisher Metal Detector. This coil offers excellent sensitivity to the tiniest targets and will be a must-have for the gold prospector and the rugged construction. A great choice for coins, relics and jewelry hunting. Perfect for shallow water hunting. In general, larger searchcoils will give better depth with larger targets and better ground coverage. However, sensitivity to smaller objects may be sacrificed. Smaller search coils will offer greater sensitivity to smaller objects and improved target separation in trashy soil. All First Texas Search coils are electro-statically shielded and waterproof.