Features: Say goodbye to thedays of test-fitting random to find the right. Savetime and effort. Easy thread size identification with reduced errorrisk, suitable for professional and enthusiasts. The bolt and nut Identifiers Gauges is selected from aluminum and hardened thread. Ensuring thread strength and accuracy for both standard and metric nut With a sliding knob and clear size marking, this tool enablesquick and precise measurement of bolt size. Fast, precise measurement, eliminating guesswork. For professional tasks. With anintuitive and durability build, suitable for quick problemsolving and perfect result. Equipped with a keychain, this thread size Checker can be conveniently attach to your key or belt, ensuring it's within reach when you need it. Specifications: Component:Iron Size:Approx.8.7cm/3.42inch Package Includes: 1Pc Thread Size Checker note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item