Product Features: Upgraded Thread Checking Set: This nut and bolt thread checker is fitted into precisely cut foam to prevent displacement, ensuring secure but easily accessible storage. It is more user-friendly than typical connected thread checkers. Lifesaver Before Heading to Hardware Store: Quickly determine the size of nuts or bolts to avoid multiple trips to the hardware store. This tool effectively differentiates between similar-looking inch and metric threads, saving time and reducing stress. Blue Aluminum Plate for Inch Size: Includes 14 inch-sized part numbers ranging from 6-32 to 1/2-20. These are placed on a blue aluminum plate for easy identification and distinction from metric sizes. Red Aluminum Plate for Metric Size: Comprising 12 metric sizes, from M4x0.7 to M12x1.75, these are positioned on a red aluminum plate for quick and clear recognition. Get Your Stuff Well-Organized: With 26 male/female gauges of the most commonly used sizes, this tool aids in the efficient sorting and organizing of your nuts and bolts, ensuring they are kept well-arranged to prevent loss or misplacement. Specifications: Product Type: Bolt Thread Checker Color: Red/Blue Product Dimensions: 7.68 x 1.89 x 6.69 inches; 300 g Quantity: 26 Pieces Material: Aluminum Exterior Finish: Aluminum Thread Sizes: Metric: M4-0.7, M5-0.8, M6-1.0, M7-1.0, M8-1.0, M8-1.25, M10-1.0, M10-1.25, M10-1.5, M12-1.25, M12-1.5, M12-1.75 Imperial: 6-32, 8-32, 10-24, 10-32, 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20 Package Includes: 26 x Nut and Bolt Thread Checkers