813-1504-5pc set of test needles -10K, 14K, 18K, 22K, and 999- is used with test stones and testing solutions to determine the contents of gold and other precious metals.
813-1505 -5pc set of test needles -8K, 10K, 12K, 14K, and 18K- is used with test stones and testing solutions to determine the contents of gold and other precious metals.