Gold Test Needles-Set Of Four-10K-14K-18K & .999 Silver Electroplating Excellent performance as an investment

Excellent performance as an investment casting alloy

740) or stainless steel (110

these studs are purpose-built for the piercing process — combining surgical-grade materials

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

Compatible with ring cutter blades 148

Gold Test Needles-Set Of Four-10K-14K-18K & .999 Silver Electroplating Excellent performance as an investmentGold 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