Fisher 11″ Black Concentric Teardrop Metal Detector Search CoilThis latest Fisher search coil has been upgraded with latest technology so that you can best take advantage of everything that your Fisher Metal Detector has to offer. In general, larger search coils 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