Features: QUALITY CONSTRUCTION: Made from sturdy stainless steel, this bolt-gauge card is resistant to rust and corrosion, ensuring long-lasting use and precision-in measurement. ACCURATE-THREAD MEASUREMENT: Easily measure the length, pitch, and diameter of screws, and other fasteners with this highly precise gauge card, perfect for DIY, automotive, and industrial applications. EASY-TO-READ MARKINGS: Features clearly engraved, easy-to-read markings for fast and accurate-identification of screw sizes, helping to save time on the jobs or in the workshop. COMPACT AND PORTABLE DESIGN: The compact size of the bolt-gauge card allows for easy storage in a toolbox or pocket, providing convenient, on-the-go measurements whenever needed. VERSATILE USE: Ideal for use with various bolt-types and sizes, this gauge card is great for mechanics, engineers, contractors, and anyone needing to measure thread specifications for precise assembly or repair tasks. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description Material: Stainless Steel Package List: 1/2/3pcs Stainless Steel Double-Sided-Bolt Gauge Card