Gold Test Needles-Set Of Four-10K-14K-18K & .999 Silver Electroplating The shelf attaches directly to

The shelf attaches directly to the GRS fixed mounting plate (104

Supports the ancient Korean technique of applying 24-karat gold foil to fine silver

740) or stainless steel (110

Manufactured to exacting production standards using a combination of machine cutting and hand craftsmanship

Rectangular shape for easy handling and bench use

Gold Test Needles-Set Of Four-10K-14K-18K & .999 Silver Electroplating The shelf attaches directly toGold test needles are an essential tool for jewelers performing acid based metal testing. This set of four needles covers three gold karats 10K, 14K, and 18K plus . 999 fine silver, giving you a reliable reference for the most commonly tested metal finenesses. To use, select the appropriate karat needle and rub or scratch it against a test stone. Make a corresponding scratch or rubbing with the item being tested alongside the needle mark. Apply a drop