I just want to ask how to open it

Sorry, let me express a different opinion
(1) At first glance, compass with the Ruler of Min keun Kwon, the shape is almost the same.
(2) Looking at the first picture, I knew that the compass could not be opened, and the two feet were actually integrated. At the same time, the rotation axis of the compass head was designed incorrectly. How could the column be pinched and rotated? Is the refill in the silicone pen case pulled out by hand? What if my refill is bald.
(3) Looking at the overall packaging, there are actually two logo of the rice house on the side of the box, and no one will do so. Moreover, the compasses are taken out without picking the hand position, so they can only be poured out.
(4) Looking at the sketch, there are many ideas, only the magnetic attraction function is presented, and the slot design of this magnetic attraction is also problematic. It will definitely fall off when used.
The work of this team has not been completed. It seems that it is a (big) student work.
Be strict with yourself

This shape is quite special.

I'm really sorry. I can't help but feel physiological discomfort in math class when I see this

This compass looks good.

Like a college student's work.

This compass can draw a larger circle