Gold Test Needles-Set Of Four-10K-14K-18K & .999 Silver Bands & Mountings forming a 100° included V-point

forming a 100° included V-point

30mm FTC118

000 rpm Collet Size (465 HP) 3/32" (2

Plunger assist lever helps manage extrusion pressure more easily

Gold Test Needles-Set Of Four-10K-14K-18K & .999 Silver Bands & Mountings forming a 100° included V-pointGold 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