Good size for leveling small cabinets or . No bends you can get with plastic versions. Measured accurately inside and out with my precision square.
Pros
Convenient positioning squares: strong, with a clear scale, high hardness, not prone to rust, easy to fix, suitable for more workpieces. Easy to carry, easy to use, and will not hurt the edges. Suitable for wood, right angle metal, 90 degree welding, etc.