I am so glad this old technology was revived, I am just amazed at what this thing can do , I had no Idea , I thought somone was mocking me when they asked me to disc out a nail in the no motion all metal, and said no it cant do that . but i Went ahead and tried it and to my suprize it ignored the nails and hit like a hammer on the small gold ring , not to mention it will not make a peep on a hot rock or nasty basalt but still hit like a hammer on the ring right thru it let the video speek for itself this is all metal not disq, but I see the advantige of using this to find gold rings it will ignor tones of small junk and its not even in discriminat mode, whoever brought this back at Tesoro should get a rase [video]https://www.youtube.com/watch?v=wdT0BLp5ET0&list=UUjtTA1ZSEXhfWtQ12CPzXnA&index=1[/video]