Not only were the edges razor sharp, there were small steel burrs at the corners that would have easily cut me had I not been extra careful. I compared it to another steel ruler I have and the markings and dimensions are very light and difficult to read. Especially when it's used on my drafting table and the light is on it, it's almost impossible to see the marks easily. The ruler is also a lot thinner than my other ruler so unfortunately I have to give this ruler a thumbs down. In addition, the seller did not offer any other option than to return the goods. Revain, ask sellers to list all tool sizes including thickness. I would not buy again.