Our drafting set square line has meanwhile been reduced to versions that are designed for use in schools, for educational purposes and for studies. The really high quality drawing set squares made of cast acrylic glass with milled edges are no longer on offer because, being not exactly inexpensive, they elicited very little demand.
The given lengths of the set-squares are, in the case of 45° set-squares the hypotenuse; in the case of 30°/60° set-squares it is the longer of the legs.
Bevelled and straight edges are usually not so great for ink drawings because the ink tends to be drawn under the set-square or ruler and when these are removed smudges can result. On a straight edge clean lines can be made with a little practice by holding the ink pen at an angle. The bevelled edge, when turned over on the other side, becomes an ink edge. (This only in the case of set-squares with no knob or ones where the knob can be removed.)
removable grip, transparent plastic, raised nubs, degrees scale runs in opposite direction and is shaded red, imprinted graduation, all outer edges are bevelled
transparent Plexiglas, without graduation, continuously adjustable, fixing screw, white degrees scale ((0°-45°, 45°-90°), all outer edges are bevelled, th = 3.5 mm
