Scola-Tec inexpensive drawing aid.
Circles stencil 1mm to 36mm in 1mm increments with guidelines for accurate drawing
20cm adjustable set square. Can be adjusted to work as a 45 degrees set square, 60/30 degrees, or any other favourable measure.
Nuts and bolts stencil perfect for drawing side views, regular shape. Easier to use on T-Square