Features: brand new and high quality There are 7 types, 80x50mm/ 100x63mm/125x80mm/200x125mm/ 200x160mm/250x160mm/300x200mm, selecting according to your needs. It is a professional tool for assembly and platform work in industrial quality. Made of hardened carbon steel, heat treated, high hardness. Designed for precise layout and measurement work and for detection of angles and part markings. The flat angle of the base is 90 degrees inside and outside. It is used to measure the right angle. It can measure the vertical deviation of the inner and outer corners of the workpiece. Specifications: Material: Carbon Steel Size: 80x50mm/ 100x63mm/125x80mm/200x125mm/ 200x160mm/250x160mm/300x200mm Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Angle Ruler