Fangrui Product Details Fast And Accurate Thread Size Verification - This Thread Size Checker Keychain Is Designed For Swift And Precise Measurement, Eliminating Guesswork And Saving Time During Your Projects. Portable Keychain Design - Easily Attach This Bolt Size Finder To Your Keys Or Belt Loop For Quick Access Anytime, Making It A Handy Tool For Both Professionals And Diy Enthusiasts. Clear Dual-unit Markings - The Bolt And Nut Identifier Gauge Features Both Metric And Imperial Measurements With Clearly Engraved Markings, Ensuring Easy And Error-free Size Identification. Sturdy, Corrosion-resistant Construction - Crafted From Premium Materials, This Thread Checker Is Built To Withstand Frequent Use And Harsh Conditions, Ensuring Long-lasting Performance. Versatile Application For All Projects - Whether Youre Working On Automotive, Home Improvement, Or Mechanical Tasks, This Thread Gauge Provides Reliable Size Verification Across Various Bolt And Nut Types. Easy To Clean And Maintain