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(+)Has a squarish end allowing it to be useful when drawing as I can estimate whether it is parallel to draw a vertical or horizontal line.

(-)Because of its squarish end, it is sharp and can scratch people due to its sharp edge and metal material.

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(+)Provides measurement up till 61cm/24inch which serves its purpose.

(-)Other end can potentially scratch people as well as it is also quite sharp.

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(-)If your work desk is not big enough, you'll have a hard time finding a place to put this aside when you don't need it.

(-)Because it is very slim, it is possible that it can slash people if a playful person like me plays with it like a sword.

(I actually got 4 cuts from this ruler before)

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(-)It is so long that it is hard to keep it concealed so that it won't poke anyone. This makes it inconvenient to bring around.

(I accidentally poked one of my classmates and injured a food court worker because my ruler was sticking out and she didn't see so she walked pass it and got scratched.)

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(+) Its flexible because of its material and width, so it is slightly easier to draw on curved surface.

(-)But it's flexibility isn't very useful it will have to be a smooth curved surface to use it to full effectiveness which is unethical as drawing on a flat surface is much easier.

(-)It's flexibility may make it permanently bent, making it not straight anymore, making drawings inaccurate.

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The reason why I chose this product is because I use this ruler a lot for drawing but I'll have to bring it to school every Wednesday for drawing classes and this ruler always injures me and is dreadful to bring around as it caused holes in my bag due to its weight

Conclusion:
What can be improved
-Minimal flexibility
-No metal
-Portability
-Safety

Solutions:
1.Make it out of plastic
2.Make it detachable into 2 pieces(30cm each) for easier portability.
3.Increase thickness from 1mm to 1.5mm to reduce flexibility
4.Round off the corners till there are no sharp edges as to estimate the horizontal line or vertical line, the lines on the ruler can be used to do so.

Further elaboration on point 2:
Make it like puzzle pieces