Specification Brand : Giwaelro BulletPoint1 : ✅【Detachable Thread Gauges in Case】All thread gauges are individually well housed in a decent foam storage holder. The biggest highlight is that you can feel free to take out any wanted pieces to do a fast thread identification. More handy to use than all thread checks on a cable or on board, which means that when you have to do thread size check on some equipment or on some hard to reach area, you do not need to spin a bulky gauge set around. BulletPoint2 : ✅【Laser-Etched Sizes on Both Sides】To better help distinguish metric and inch sizes, we make metric and standard items in different colors respectively ( blue for SAE, red for metric). Moreover, we improve thread checker set with each thread size gauge etched in double sides( front and back side), which avoid the hassle that you have to spin a round to check the etched size on the thread gauges. BulletPoint3 : ✅【3 Clear Ways to Read Size】The another highlight of this screw gauge is that you are able to clearly and easily read the gauge size in 3 various ways: sizes clearly engraved on gauges themselves, a size chart on art paper sticker and sizes screen printed on foam. Each size printed on chart or foam is corresponding to the relative thread gauge. When you just want to handle one checker size at a time. You can visually see the sizes easier, match up and take out the expected sizer. BulletPoint4 : ✅【23 Inch & 21 Metric】Inch in blue:1-12,1-8,3/4-16, 3/4-10, 5/8-18, 5/8-11, 9/16-18, 9/16-12, 1/2-20, 1/2-13, 7/16-20, 7/16-14, 3/8-24, 3/8-16, 5/16-24, 5/16-18, 1/4-28, 1/4-20, 10-32, 10-24, 8-32, 6-40, 6-32; Metric in red: M3-0.5, 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, M14-1.5, M14-2.0,M16-1.5, M16-2.0, M20-1.5, M20-2.5, M24-2.0, M24-3.0; (Size Numbers are white and permanently stamped on studs; very clear to read) BulletPoint5 : ✅【Quick Identification and Time Saver】Just screw the nut or bolt onto thread gauge. Only take seconds to check the size. With Giwaelro thread checker standard and metric, you can easily and quickly check correct size of the nuts & bolts and replace the snapped, loose, rusted or old ones at home or garage by yourself, no need to run towards hardware store for size check any more, greatly improving your work efficiency. BulletPoint6 : ✅【 Get Your Mixed Nuts and Bolts Well Classified】This nuts and bolts organizer comes with 44 pcs male and female gauges——mostly frequent used in daily mechanical work or home project, which can help you quickly sort out your mixed nuts/ bolts and get them well classified and organized in your compartment case from misplace, mess and loss. A perfect nut and bolt gauge for personal use or for family or friends who loves tinking or DIY. Color : Red ItemName : Giwaelro Nut and Bolt Thread Checker - 44 PCS Nut and Bolt Gauges Individually Housed in Case (23 Inch & 21 Metric) Specially Suitable for Size Check on Tricky and Narrow Area ItemPackageDimensions_Height : 30.3 centimeters ItemPackageDimensions_Length : 5.9 centimeters ItemPackageDimensions_Width : 24.5 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : thread-gauges Manufacturer : Giwaelro Material : Aluminum MetalType : Aluminum NumberOfItems : 1 NumberOfPieces : 44 PartNumber : RedBlue44 ProductDescription :