Simple and Safe: The diamond testing pen offers fast and accurate results, making it ideals for beginners. It is packaged in a durables box with a manual for easy usage. All-Inclusive: The set includes all necessary measuring and testing tools for purchasing and monitoring diamonds, ensuring you're prepared for any situation. Precision and Ease: This gem testing equipment provides quick and precise results, users in the diamond and gemstone industry. Its straightforward design caters to all skill levels. Accurate and Simple: This gem testing equipment delivers fast, precise results, making it suitable for anyone involved in the diamond or gemstone industry. Service: If you have any questions, please feel to contact us and we will reply within 24 hours!The simple design and comprehensive package make it perfect for both professionals and novices.