Sonic checkers

http://cgi.ebay.com/Ultrasonic-Thic...hZ008QQcategoryZ58234QQtcZphotoQQcmdZViewItem

Ihave tested it on iron,plastic,glass and has been spot on,i just bought mine a few days ago and see theres been a $10.00 increase in price,,still not a bad price for a fully adjustable sonic tester,,wayne