Ingenuities
#1 Serrated edges
The movement axis side have serrated edges to allow one-handed operation.
That feel is just right, easy to turn.
#2 Fun shaped lines = Angle
The fan shaped lines are ±15° in ±5° increments with the central line. The lines itself represent the angle. The angle will be predicted in 15° increments and measurd simply by increasing or decreasing it in 5° increments.
#3 Angles can be read on both sides
The angles can be read regardless of whether they are back or front, making it easy to compare left and right angles.
Blue labels with blue letters, red labels with red letters.All letters face sideways. It is surprisingly easy to read.
#4 Screw will not loose
It may be a little difficult to see, but there are three blades out to hold the threaded rod (one of the blades is shown in green).The screws do not loosen. If they do loosen, they can easily be re-tightened with pliers and a screwdriver.
