Experience convenience in thread measurement with our Portable Precise Thread Size Checker Keychains, a must tool for quick and accurate Bolts and nut identification Enhances your toolkit's functionality with this Bolts Size Finder Keychains; its 8cm length makes it a accessory for professional and hobbyists alike For mechanical engineers, assembly workers, and enthusiasts, this thread gauge Keychains simplifies the task of measuring various Bolts size Crafted from resistant metal, this Bolts finder is to withstands any site while offering you portability and ease of use Whether on the factory floor, at a machinery repair site, or during a home project, our Nut and Bolts Thread Gauge Identifier ensures you have the tool at your fingertips, Manufacturer: Xuancai