Based on this product's specifications, here are some alternatives and similar models
Angle ruler Topex 30C320 600×400 mm roof/angle measuring square
Summary description:
Topex 30C320 is an angle measuring square with dimensions 600×400 mm designed for roof and angle measurements. The tool provides a rigid L-shaped profile to check and mark right angles, slopes and alignments in carpentry and construction tasks. Suitable for site layout, cutting guides and verifying perpendicularity of structures.