4 piece set of test needles, 10K, 14K, 18K and silver, to use with test stones and testing solutions to determine the contents of gold and other precious metals.<br /><br />Find this tool at: http://www.jewelrytools.com/eurotool/jewelry-testing-supplies/Gold-Test-Needles-Set-of-4.html<br /><br />Find more at http://www.jewelrytools.com
