Gold Test Needles Set of Five-10K-12K-14K-18K-& 22K Prop 65 - Lead-Phthalates and custom metal shapes

and custom metal shapes

Deburring ejector pin holes

it supports casting in platinum

each mandrel is sized for comfortable hand use and precise control

Graduated USA standard ring sizes 1–15

Gold Test Needles Set of Five-10K-12K-14K-18K-& 22K Prop 65 - Lead-Phthalates and custom metal shapesGold Test Needles Set of Five (10K, 12K, 14K, 18K & 22K) This professional set of gold test needles includes five needles, each tipped with a different karat of gold, allowing jewelers and metalsmiths to perform comparative acid testing across the most common gold purities. By rubbing each needle against a test stone alongside an unknown gold item, then applying testing acid to both marks, you can observe and compare the acid reactions to estimate the