Search depth and ground coverage compared. With standard coils increased to 50%. (depends on metal detector manufacturers). Extremely robust coil mounting bracket. Coil outter shell and face made from impact resistant.
Composite materials which also UV stabilised. Coil cover protect the search coil from damage and chipping. (coil also can use without this cover without any problems). Recommended for professionals and amateurs!
If you are interested in other sizes of coils. I will put them on sale. NEL TORNADO 12x13 DD 5th gen search coil for Garrett AT Pro + cover+bolt" is in sale since Friday, June 17, 2016. This item is in the category "Consumer Electronics\Gadgets & Other Electronics\Metal Detector Accessories". The seller is "coilsnel" and is located in Europe.This item can be shipped worldwide.