Gold Test Needles-Set Of Four-10K-14K-18K & .999 Silver Bands & Mountings Also effective on fine steel

Also effective on fine steel surfaces

shielded ball bearings Drive Type Square drive (H-type only) Chuck Key Included

193 are sold separately

Plunger assist lever helps manage extrusion pressure more easily

Gold Test Needles-Set Of Four-10K-14K-18K & .999 Silver Bands & Mountings Also effective on fine steelGold 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