The K-D Tools Feeler Gauge Set is a precision measuring tool with a range of thickness measurements from .002 inches to .025 inches (51mm to 635mm). Made in the United States, this set features a standard (SAE) system of measurement, perfect for accurately measuring the thickness of various materials in a workshop or home setting. With a focus on quality and accuracy, this USA-made tool is designed to help users achieve precise results in their measuring and layout tasks.Email with questions