Gold Test Needles-Set Of Four-10K-14K-18K & .999 Silver Bands & Mountings Plunger assist lever helps manage

Plunger assist lever helps manage extrusion pressure more easily

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

Brand Sangers® Construction Emery cloth Grit Range 4/0 (finest) – #3 (coarsest) Quantity 12 pieces per set Mandrel Compatibility Wood mandrel What's Included

193 are sold separately

Also effective on fine steel surfaces

Gold Test Needles-Set Of Four-10K-14K-18K & .999 Silver Bands & Mountings Plunger assist lever helps manageGold 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