Features DURABLE MATERIALS: The thread identifier board is made of 6061 aluminum alloy, with hard anodized finish, and all threaded pins are made of SUS304 material, rust and corrosion resistance. HIGH ACCURACY: With exquisite workmanship, this thread identifier board has standard sizes to ensure accurate and reliable measurements, improve work efficiency, and reduce errors. WITH WORK GLOVES: This kit is equipped with a pair of work gloves to protect hands from accidental injury, and convenient to pick up bolts and nuts to prevent them from slipping off at will. INCH AND CM SCALES: The edges of the thread measuring gauge has inch and cm etching scales, which are clear and accurate, helping to distinguish the size of bolts and nuts. SPECIFICATIONS: This thread checker can easily identify 28 different sizes of bolts and nuts, ranging from M4x0.7 to M14x2.0 metric thread, from 6‑32 coarse to 1/2‑20 fine American thread. Specification: Item Type: Bolt Nut Thread Checker Material: Aluminum Alloy Metric Thread: 4mm x 0.7, 5mm x 0.8, 6mm x 1.0, 7mm x 1.0, 8mm x 1.0, 8mm x 1.25, 10mm x 1.0, 10mm x 1.25, 10mm x 1.5, 12mm x 1.25, 12mm x 1.5, 12mm x 1.75, 14mm x 1.5, 14mm x 2.0 American Thread: 6-32 Coarse, 8-32 Coarse, 10-24 Coarse, 10-32 Fine, 1/4-20 Coarse, 1/4-28 Fine, 5/16-18 Coarse, 5/16-24 Fine, 3/8-16 Coarse, 3/8-24 Fine, 7/16-14 Coarse, 7/16-20 Fine, 1/2-13 Coarse, 1/2-20 Fine Package List: 1 x Nut Bolt Thread Identifier 2 x Gloves Note: Be sure to wear work gloves during the comparison to protect your hands and avoid accidental injury. Package List 1 x Nut Bolt Thread Identifier 2 x Gloves