ISO metric ellipse/circle stencil – Code S 1833M
Orthographic projection stencil include arrowheads, linespacing pinholes.
Scola-Tec unbreakable 45 set square with cross hatching and lettering guidelines.
20cm adjustable set square. Can be adjusted to work as a 45 degrees set square, 60/30 degrees, or any other favourable measure.