The Screw Measuring Tool M2-M10 by Olah Technologies LLC is a precision tool designed for accurately measuring the length of screws ranging from 4mm to 100mm. Made in the United States, this tool is essential for machining, hardware, and lock projects that require precise measurements. With its high-quality construction and reliable performance, this tool is a must-have for professionals and hobbyists alike who need to ensure accurate screw measurements in their work.