Features: 46 thread sizes with this precise engineered thread checker gauge, featuring comprehensive holes for screws, nut, and bolts to verify compliance with industry standards effortlessly. Its square shaped aluminum body ensures nonslip grip and stable placement, while color coded holes enable fast identification double thread specifications. Ideal for mechanics, engineers, and DIYer enthusiasts requiring reliabled thread measurement in manufacturing workshops or home garage projects. Streamlines production line inspections, repair shop diagnostics, or construction site installations by quickly verifying screw compatibility and preventing mismatched fasteners. Engineered with aerospace grade aluminum, this screw gauge combines portability with laboratory grade accuracy for professional bolt measurement across industrial and hobbyist applications. Specifications: Component: aluminum alloy Size: Approx.30x35cm/11.81x13.78inch Package Includes: 1pcs 46 Hole Thread Gauge note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.