The effective length of each rod does not include the threaded shank, making them straightforward and easy to use. This design consideration ensures that measurements are accurate and that setup is quick and efficient. Constructed from premium Stainless steel, these 6 indicator extension stem rods are meticulously crafted to resist rust and durability. Each rod is designed to provide reliable, long-lasting performance in professional and industrial settings. Featuring a universal M2.5 thread, these extension rods are compatible with most indicators, height gauges, and other measurement tools. This standard threading ensures a secure fit and precise measurements every time. This set includes six varying lengths: 30mm, 40mm, 60mm, 80mm, 100mm, and 150mm. You can combine them in any configuration up to a total extended length of 365mm, allowing for versatile and customized measurement setups. Ideal for a wide range of applications, these extension rods fit seamlessly with indicators, depth gauges, and other interchangeable measurement tools. They are essential for precise measurements in engineering, manufacturing, and quality control processes., Manufacturer: Akfldms