Product name: Multifunctional drawing ruler
Color: blue/black
Size: 12*12cm
Features: The middle part can be rotated, it is widely used, the scale is clear, and the drawing is convenient.
Reminder: Avoid sand and dust from entering the interlayer of the multi-function ruler to avoid unfavorable rotation. In case of inflexible rotation, add a small amount of wax to lubricate between the rotating disk of the scale surface and the base.
