NEL Storm 13" x 14" Coil For Garrett AT Pro Series Metal DetectorsCoil Storm is designed to detect medium and small targets at depth which is unattainable for any other standard coils. Working with a slow swing will maximise its ability in finding not only large and medium targets but small targets which weigh less than 1g at 20 cm deep as well. The Storm coil is suited for finding coins, treasures and artifacts in the field of military battles in any territory. This coil is superior to standard coil in depth by 35%