Gold Test Needles Set of Five-10K-12K-14K-18K-& 22K Vises this die-struck ring mounting delivers

this die-struck ring mounting delivers the refined quality and precision fit that professional jewelers demand

Length 7 in

3" diameter jewelers table bracket (M041) for mounting the arm assembly to your bench

Block Diameter 5" (maximum width) Jaw Width 2-5/8" Jaw Height 1-1/2" Maximum Jaw Opening 3" Weight Approx

Gold Test Needles Set of Five-10K-12K-14K-18K-& 22K Vises this die-struck ring mounting deliversGold 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