Clear Thread Size Markings: Easily identify thread sizes with precision, reducing errors for professionals and DIYers alike. Keychain Compatibility: Conveniently attach to your keys or belt for quick access whenever needed, ensuring portability and accessibility. Quick & Accurate Measurement: Simplify verification of thread sizes with one-handed operation, saving time and effort on projects. Sturdy & Durable Construction: Crafted from high-quality corrosion-resistant materials, ensuring long-lasting performance in various conditions. Versatile Tool for Precision Work: Slide the knob effortlessly to tighten and measure workpieces, offering flexibility and convenience for precise measurements on any project. Description: Introducing the bolt ruler, a reliable tool for professionals and DIYers alike. The size markings on this ruler are clear and easy to read, ensuring direct identification of thread sizes and minimizing errors. Designed for quick and accurate measurement verification, this tool eliminates guesswork, saving time and effort. With a keychain loop, it can be conveniently attached to your keys or belt, ensuring it's always within reach when needed. Made of high-quality corrosion-resistant materials, this ruler is sturdy and durable, capable of withstanding frequent use and harsh conditions for long-term performance. Slide the knob with one hand to quickly tighten and measure workpieces, providing flexibility and convenience for precise measurements on any project. Item Name: Bolt Ruler Material: Metal Features: Quick Accurate Measurement, Portable, Heavy Duty Size Details: Length: 8cm/3.15" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1pc: 1 x Bolt Ruler or 2pcs: 2 x Bolt Ruler