Nut and Bolt Gauge: This package includes 3 plastic bolt thread gauges. Made from durable plastic, these gauges feature a smooth surface that is easy to clean and resistant to oil and grease, ensuring long-lasting use. Their compact size makes them easy to store and highly portable.Versatile Measurement Tool: These gauges are designed to measure bolt sizes ranging from 1/4 inch to 1 inch in diameter and fractional bolt lengths up to 7 inches. They are also effective for measuring metric bolt and screw sizes from 3mm to 22mm. This tool is a helpful aid for both industrial and household applications.High Precision Design: Each bolt thread gauge is precisely molded from high-quality plastic for reliable performance. Resistant to scratches and wear, the gauges maintain accuracy over time. The bright red, blue, and white color options make them easy to locate in your workshop or garage.Practical Toolbox Addition: The gauge features multiple holes for quick identification of bolt and nut sizes, helping you determine the correct size before purchasing replacements. The gauges are connected by a metal ring for convenient organization and easy access.Easy and Accurate Measurement: Equipped with clear inch and millimeter markings, this tool allows for fast and accurate measurement of nuts, bolts, screws, and washers. Its user-friendly design supports efficient identification in various settings.Color: As Shown Material: Plastic Package Contents: 3 x Bolt Thread Gauges Note: Only the items listed above are included. Note: Slight variations in color may occur due to lighting and display differences. These variations do not affect the functionality of the product. Measurement error allowance: +/- 1-3 cm.