Features: Nice Craftsmanship: Bright surface color and smooth base surface, as well as quality material; Without trace, it will let you have a nice and comfortable use experience. Proper Size: The proper size will ensure the accuracy of the measurement data, also allow you to hold the rule easily and firmly. Safe and Reliable: Use rivet links design, so it will not endanger your safety; Besides, its chassis is heavy,upright and stable, as well as not inclined, so the measurement data is more accurate and easy to read. Nice Work Performance: Can be applied to various engineering measurements, it can accurately measure the vertical deviationof internal and external angles; The accurate 90 degree angle has no difference, assuring the measurement data correct without error. Easy to Identify: Engraved with dimensions and clear numbers, so you can quickly identify the data,which ensures that you can easily measure each right angle. Specifications: Type: Wide Seat Square. Material: Carbon Steel. Size(L*W): About 100x63mm/3.94x2.48inch. Package Included:1pc x Wide Seat Square.