the purpose is to show sounds, and digging tecniqes, I did not find much, but the grounds keeper did stop and talk and said it was fine if I keep searching , I should have had the 15" WOT but i had more targets than i could handle anyway , i like to clean up the bobby pins and nails, i did get a deep aluminum can out and then found a dime right next to it it was being masked , thats why i dig all . leaves the field clean and easere to cover nextime hope you enjoy some of the humer LOL[video]http://www.youtube.com/watch?v=FnA0CCv5CjM[/video]