This Etalon set includes four internal micrometers with a 3-point design, ideal for measuring dimensions in precision. The micrometers are made in Switzerland and come in the following sizes: 10÷12, 12,5÷15, 15÷17,5, and 17,5÷20 mm. They are perfect for use in various industries, including business and industrial settings. The brand Etalon is known for its high-quality measurement and inspection products, and this set is no exception. Each micrometer is designed with precision and accuracy in mind, ensuring reliable results every time. Whether you're a professional or a DIY enthusiast, this set is a great addition to your toolkit.