Description: 【Comprehensive Set】: Instantly and accurately identify 44 different male (bolt) and female (nut) threads. This complete kit includes 23 of the most common inch sizes and 21 metric sizes, eliminating guesswork and saving you time on any project 【Premium Stainless Steel Construction】: Each individual gauge is crafted from quality stainless steel for maximum durability and resistance to rust 【Convenient & Organized Storage】: The entire set comes neatly organized in a sturdy storage case. Each gauge has its own designated place, making it easy to find the size you need and to see if any are missing. Suitable for keeping your tools organized in the shop or on the go 【Effortless Identification】: Each gauge is permanently stamped with clear size markings that won't rub off over time, allowing you to easily isolate the gauge you need while keeping the entire set together and avoid loss 【Essential Tool for Any Workshop】: A must have for mechanics, machinists, maintenance workers, and serious DIY enthusiasts. Suitable for sorting through that miscellaneous bin of nuts and bolts, verifying fastener sizes for automotive repairs, plumbing, or any assembly project Specification: Material: Stainless Steel Size Chart: Box: 27.4 cmx21.9 cm/10.79 inchx8.62 inch Package Includes: 1 Set Nut and Bolt Thread Checker Note: Please allow slightly errors due to manual measurement and different monitors.