Agree with comments that the DD coils just do not work as well as concentric for the Tesoro Tejon, especially the larger coils. I use 5.75" coils most of the time due to the trash infested and overgrown areas that I search. The concentric 5.75" does a better job but I also use the 5.75" DD Widescan on repeat trips. The DD can snipe between nails and pick out a few items the concentric had missed. The DD does false on steel twist off beer caps which is quite annoying.