Gold Test Needles-Set Of Three-10K-14K-18K G-Tac Cut grades run from 00

Cut grades run from 00 (extra coarse) to 4 (fine) — the higher the number

606 (JR-1C2-B) – single-sided stand-up dust collector

Ball Diameter 3-15/16" Construction Drop forged Finish Basic polish (user-refinishable) Origin Made in the USA

Working Surface Diameter 3 inches Working Surface Material Stainless steel Sleeve Material Plastic Compatible Handpiece Style #30 style flex shaft handpiece Recommended Bur Size 11

This sterling silver fancy long & short flat chain offers an elegant alternating link pattern suited for finished jewelry resale or custom chain work

Gold Test Needles-Set Of Three-10K-14K-18K G-Tac Cut grades run from 00Gold test needles are an essential tool for jewelers performing acid based karat testing. This set of three needles covers the most commonly encountered gold karats in jewelry: 10K, 14K, and 18K. Use these needles as reference standards when comparing acid reactions on a test stone to determine the karat of an unknown gold item. To use, select the appropriate karat needle and rub or scratch it against a test stone. Make a second rubbing or scratch