awagas 44 Male/Female Bolt Size and Thread Gauge, Nut and Bolt Thread Checker Standard and Metric Set (23 Inch & 21 Metric), Easy to Use Bolt Measuring Tool, Quick Identifier, Portable Machinist Tools

23 inches and 21 metric, each comes with nuts and bolts. Provide with a quick and comprehensive judgment, then simply take this little product to the hardware store to purchase what you need;
A useful tool for any garage or home mechanic, hobbyist or tool collector. It makes it much easier to work on your car or house, or anything that needs it;
Help check and sort to keep all those little things organized, And you know exactly what you already have so you don't waste money on a bunch of things that don't fit!
Easy identification of nuts and bolts in confined areas, upgraded engraving, and color differentiation make this product visible and easy to read at all times and in all places, so it won't be accidentally dropped and lost or rendered unusable due to marking issues;

44Pcs Nut and Bolt Thread Checker with Portable Box:

23Pcs with Inch Size - 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.

21Pcs with Metric Size - M3x0.5, M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, M12x1.75, M14x1.5, M14x2.0, M16x1.5, M16x2.0, M20x1.5, M20x2.5, M24x2.0, M24x3.0.