The Foldable 5X Magnifier Linen Tester/Thread Counter is a versatile tool suitable for identification and testing purposes. Made in Japan with high-quality glass material, this magnifier is compact and easy to use. Its black color makes it discreet and sleek for any jewelry or watch repair setting. With its foldable design, this magnifier is convenient to carry and store, making it a must-have for professionals in the jewelry industry.