Try Square Aluminum

Stainless Steel Blade & Heavy Duty Aluminium Handel.
Tri-square, an popular woodworking and metalworking tool primarily used to check and marking 90-degree angles. It’s essentially a precision instrument designed to ensure that surfaces are at right angles to each other.

In metalworking and engineering, try squares are used to check the squareness of edges and corners of metal parts, and for marking lines at right angles to machined surfaces.