Bolt Size Finder Keychain 28 Precise Thread Identification Gauge Nut And Bolt Thread Thread Pitch Identifier Tool Metric Small Size Steel Gauge Also makes it easy to categorize the right size nut and bolt. 【Finely Machine】Nuts, bolts and machine screws thread easily for accurate measurement, when compared with rulers and tape measures. 【Easy and Quick Access】The Thread checker can lay on bench or hang on the wall, tool chest. Metric And Standard Thread Gauge Tool 1pc Nut Thread Checker 14 Metric 14 Standard - Ireland Nut Bolt Size Gauge The Aspireartisans gauge features 28 different thread sizes including Metric from M4x0.7 to M14x2.0 and Imperial from #6-32 to 1/2-20, covering virtually every... 【Easy to Check】The lettering are clear whether metric or standard, include rulers to determine the length of the bolts. Also makes it easy to know what you need before you head to the store. Thread Checker Nut & Bolt Gauge - 14 Standard & 14 Metric Sizes, Laser-Etched Ruler, Bolt Identifier Board (Red) Thread Checker Standard And Metric Meeting Go & No Go Class 2B ANSI standard specifications.