Key Features

• •INSTANTLY IDENTIFY 31 SIZES (SAE & METRIC) – Eliminate the frustration of mismatched hardware with this comprehensive nut and bolt thread checker. This tool precisely identifies 16 SAE (Standard) and 15 Metric sizes, covering the most common dimensions needed for automotive, mechanical, and household repairs. It is the ultimate thread checker standard and metric solution for sorting mixed fastener piles quickly.
• •HEAVY-DUTY STAINLESS STEEL CONSTRUCTION – Unlike cheap plastic alternatives that strip or break easily, our thread gauge is crafted from premium, high-durability stainless steel. This robust bolt thread checker is rust-resistant and designed to withstand heavy daily use in greasy garages or professional workshops, ensuring your screw size gauge remains accurate for years to come.
• •HIGH-VISIBILITY & COMPACT DESIGN – Designed for efficiency, this bolt and nut sizer features clear, easy-to-read markings that make sizing effortless, even in low-light conditions. The checkers are strung on a convenient wire loop, making it a portable screw size checker you can hang on your workshop wall or toss into your toolbox without losing individual pieces.
• •SAVE TIME & PREVENT THREAD DAMAGE – Stop forcing the wrong nut onto a bolt and stripping the threads. This screw thread checker acts as a precise bolt size finder, allowing you to verify sizes before you buy replacements or start a project. It serves as a physical screw sizes chart, saving you unnecessary trips to the hardware store and ensuring a perfect fit every time.
• •THE ULTIMATE GIFT FOR DIYERS & PROS – Practical, durable, and incredibly useful, this bolt and nut gauge is the perfect addition to any toolbox. It makes an excellent gift for mechanics, fathers, husbands, or any handyman who loves organization. Whether for Father’s Day, Christmas, or a birthday, this screw gauge sizing tool is a gadget that will actually get used.