Specification Brand : YedaHcy BulletPoint1 : Comprehensive Set: Includes 44 male and female gauges, covering 23 inch and 21 metric sizes to meet all your nut and checking needs. BulletPoint2 : sturdy Construction: Made of robust zinc alloy, this thread checker set is built to withstand frequent use and last for years. BulletPoint3 : Accurate Identification: Features dual-sided printing for precise and easy-to-read measurements, ensuring accurate thread identification. BulletPoint4 : Wide Application: Suitable for use in various industries and applications where accurate nut and thread checking is required. BulletPoint5 : Portable and Convenient: Lightweight and compact design allows for easy carrying and storage, making it a convenient tool for on-the-go use. Color : New 28 Hole Red ExternallyAssignedProductIdentifier : 7687930413167 ItemName : Nut and Thread Checker Set, 44 Male Female Gauges, 23 Inch and 21 Metric Sizes, Zinc Alloy Construction, Dual Sided Printing for Accuracy ItemPackageDimensions_Height : 4 centimeters ItemPackageDimensions_Length : 24 centimeters ItemPackageDimensions_Width : 12 centimeters ItemTypeKeyword : thread-gauges Manufacturer : YedaHcy ModelNumber : YedaHcy94gk63781r PartNumber : YedaHcy94gk63781r ProductDescription : Item Type: Thread Checker Material: Zinc Alloy Weight: Approx. 963g / 34oz Black 21 Metric Sizes: M3x0.5, M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8X0.25, M10X0.25, M10x1.5, M12x1.5, M12X1.5, M12X1.5, M14x2.0, M16 x1.5, M16x2.0, M20x1.5, M20x2.5, M24x2.0, M24x3.0 Silver 23 Inch Sizes: 6-32, 6-40, 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, 9/16-12, 9/16-18, 5/8 -11, 5/8-18, 3/4-10, 3/4-16, 1-8, 1-12